Plastic model building is one of the most rewarding hobbies you can pick up. You start with a box of plastic parts and end up with something that looks genuinely impressive on the shelf. But the gap between "box of parts" and "impressive model" depends heavily on knowing the basics — the right tools, the right glue, the right approach to painting. This guide covers everything you need to build your first plastic kit properly, not just adequately.
Choosing Your First Plastic Model Kit
The single biggest mistake beginners make is buying a kit that's too ambitious. A 1:35 scale tank with 400 parts, photo-etched details, and complex camouflage painting will sit half-finished in a drawer. Start with something achievable.
Scale and Part Count
For a first kit, aim for:
- 1:72 aircraft — small, light on parts, quick to build. The Airfix Supermarine Spitfire Mk.Ia at 1:72 is practically the canonical beginner's kit. Around 48 parts, fits together reliably, and looks outstanding when finished.
- 1:48 aircraft — slightly larger, easier to handle small parts, still manageable.
- 1:72 or 1:76 vehicles — a simple Airfix or Revell car or tank at this scale builds in an afternoon.
- Starter sets — Airfix Starter Sets include the kit, basic paints, a brush, and glue. For an absolute beginner, the bundle removes the question of which additional supplies to buy.
Avoid 1:35 scale armour and 1:32 aircraft for your first few builds — they're rewarding eventually, but they demand more skill and patience than a first build should require.
Brand Reliability
For beginners in the UK, Airfix is the natural starting point. Their kits are designed with beginners in mind, the instructions are clear, and the parts fit well. Revell is equally reliable and their range includes some excellent subjects. Tamiya is universally regarded as having the highest part fit quality — their kits go together with barely any gap-filling required — though they cost a little more. Browse our full range of plastic model kits to find the right subject for you.
For more detailed advice on choosing a subject, see our scale model kits guide and our article on understanding scale models.
Essential Tools for Plastic Model Building
You don't need a lot. But having the right tools from the start makes a noticeable difference to the quality of your finished model.
The Non-Negotiables
- Sprue cutters (side cutters) — the single most important tool. These flush-cut pliers remove parts cleanly from the plastic frame (the sprue) without the white stress marks you get from using scissors. Don't skip these. A decent pair costs around £5–12 and lasts for years. Tamiya make excellent ones.
- Modelling knife (scalpel) — a No.1 handle with No.10A blades is the standard choice. You'll use this constantly: trimming sprue gates, cleaning mould lines, scribing panel lines, cutting masks. Keep spare blades — a sharp blade does better work and is actually safer than a blunt one.
- Sanding sticks and wet-and-dry paper — for cleaning up sprue attachment points and removing mould lines. A set of sanding sticks in 180, 400, and 800 grit covers most situations. Tamiya and Vallejo both make good sets. Wet-and-dry paper used wet is ideal for finer finishing work.
- Tweezers — straight and angled. For placing tiny parts, holding decals, positioning masking tape on small areas. Stainless steel with fine points.
- Cutting mat — protects your work surface and gives you a flat, stable base. The self-healing A3 green mats are the standard. Don't work on a bare table.
Useful Additions
- Files — a set of needle files (square, round, half-round, triangular) for reaching into recesses that sanding sticks can't. Particularly useful for cleaning up interior cockpit parts on aircraft kits.
- Clothespeg clamps and rubber bands — for holding parts together while cement cures. You'll find yourself needing these constantly when gluing fuselage halves.
- Palette and water pot — for mixing and thinning paints. Even a small ceramic tile works as a palette.
- Task lighting — an Anglepoise or LED daylight lamp makes a significant difference to seeing detail clearly, especially when painting.
Cement Types: Choosing the Right Glue
This is one area where beginners frequently use the wrong product and then blame the kit for poor results. Plastic model cements are not all the same, and each type has specific uses.
Polystyrene Cement (Poly Cement)
This is the standard cement for plastic model kits. It contains a solvent that melts and fuses the plastic surfaces together — you're not actually gluing the parts, you're chemically welding them. The result, when done correctly, is a bond as strong as the plastic itself with no visible join. Apply a thin layer to one surface, press the parts together, hold for 30 seconds, and leave to cure for several hours before handling.
Best for: Structural joins — fuselage halves, hull sections, wing-to-fuselage, any join that needs strength and a clean finish.
Common brands: Revell Contacta (the gold standard — fine nozzle, excellent control), Airfix Poly Cement, Tamiya Extra Thin Cement.
Watch out for: Using too much. Excess cement causes white crazing on surrounding plastic that's difficult to fix. Apply sparingly — capillary action draws liquid cement into the join automatically.
Liquid Cement (Extra Thin Cement)
Liquid cement is thinner and more fluid than standard poly cement. Instead of applying it before joining parts, you bring the dry parts together first, then touch the brush tip to the joint — the liquid wicks into the seam by capillary action and fuses the plastic.
Best for: Already-assembled joints where the fit is good. Re-cementing parts that have come loose. Applying to tight-fitting joins where standard cement would squeeze out.
Best product: Tamiya Extra Thin Cement is the hobbyist consensus favourite — it has fast-setting and slow-setting versions, the applicator brush is precisely calibrated, and the formula is very controllable. Revell Contacta Professional is also excellent.
Cyanoacrylate (Super Glue / CA Glue)
Superglue works on virtually any material and sets almost instantly, but it doesn't chemically fuse polystyrene plastic in the same way cement does. The bond is mechanical rather than molecular, making it somewhat weaker for structural plastic joins.
Best for: Attaching metal parts (photo-etched brass), resin parts to plastic, rubber tracks on tank kits, any non-styrene material. Also useful for filling very fine gaps when mixed with bicarbonate of soda (creates a hard filler that sands easily).
Avoid: Using super glue as a direct substitute for poly cement on structural plastic-to-plastic joins. It fogsadjacent plastic in humid conditions and the bond is typically inferior for this application.
The Build Process, Step by Step
Read the Instructions First
All of them. Before you cut a single part from the sprue. Understand the build sequence — some parts need painting before assembly makes them inaccessible. Cockpit interiors on aircraft, engine compartments on vehicles, and crew figures all typically need painting before the surrounding bodywork goes on. Building blindly and then discovering a visible interior has been sealed inside unpainted is a common and avoidable mistake.
Remove Parts Cleanly
Use your sprue cutters to snip parts free — but leave a small stub of sprue attached at each gate rather than cutting flush. Then use your modelling knife to trim the stub close to the part, followed by sanding to flush. This two-stage approach avoids the white stress marks you get from cutting too close in one go. Always cut and clean the gate on the least visible surface of the part where possible.
Remove Mould Lines
Every injection-moulded part has mould lines — faint ridges running along the part where the two halves of the mould met. On a finished, painted model these are very visible. Remove them now, before assembly, with a sanding stick or modelling knife blade scraped along the line. This is tedious but it's the difference between a model that looks kit-built and one that looks like a scale replica.
Dry-Fit Before Gluing
Always offer parts up together dry — without cement — before any glue goes on. Check the fit, identify any problems, plan how you'll hold the parts during cure. Some kits have joins that need to be assembled in a specific order; dry-fitting reveals this before it becomes a crisis.
Glue Carefully
Apply poly cement to one surface only and apply it sparingly. Use the brush to paint a thin line along the join area, not a thick blob. Bring the parts together, press firmly and hold for 30 seconds. Excess cement that squeezes out can be left to cure fully and then scraped away with a knife — trying to wipe wet cement spreads the damage.
Filling Gaps and Fixing Mistakes
Even the best kits leave some gaps at seams. Military vehicles and aircraft fuselages in particular often have a visible seam along the centre line. This needs filling before painting or it'll be clearly visible through the finished paint.
Plastic Filler (Putty)
Tamiya Basic Type Putty is the industry standard — a grey, smooth putty that sands easily and takes paint without shrinking. Apply it with a cocktail stick or old brush, overfill slightly, allow to cure for at least an hour (longer is better), then sand back progressively with 180, 320, and 400 grit paper until flush. Revell Plasto is another reliable option.
Mr Surfacer (Liquid Filler)
Mr Surfacer is a liquid filler/primer that can be thinned and applied into very fine seams. Applied by brush into a thin gap, it fills and primes simultaneously. Mr Surfacer 1000 is the standard choice for fine seam work; Mr Surfacer 500 for larger gaps.
CA Glue and Bicarb Method
For pin holes and very small gaps, the CA-bicarb method is fast: pack the gap with a tiny amount of bicarbonate of soda, then drop CA glue on top. It cures almost instantly into a hard plastic-like material that sands beautifully and takes paint well.
Sanding and Surface Preparation
The quality of your painted finish is determined almost entirely by the quality of the surface preparation underneath. Sanding is not optional — it's the difference between a smooth, convincing finish and one that shows every blemish.
Progress through grits: start with 180 or 240 grit to level filler and remove obvious marks, move to 400 to smooth the surface, and finish with 800 or 1000 grit before priming. After filling and sanding, always apply a coat of grey primer (Tamiya Surface Primer in a rattle can is excellent) before your colour coats. Primer reveals surface flaws you missed — seams you thought were filled, scratches, sink marks. Address these before any colour goes on.
Painting Your First Model
Painting a model kit is its own subject — but here are the fundamentals.
Brush Painting vs Airbrushing
For your first few builds, brush painting is completely appropriate. A decent synthetic brush in size 1 or 2 for large areas and a size 00 for details covers most needs. Use acrylic model paints — Humbrol Acrylics, Vallejo Model Colour, or Tamiya Acrylics — as they're water-thinnable, dry quickly, and clean up with water. Apply thin coats — two or three thin coats always produce a better result than one thick coat that runs and obscures detail.
An airbrush produces smoother, more even results on large surfaces and allows realistic gradients (pre-shading, zenithal lighting). But there's a steep learning curve, and a brush-painted model with good technique looks excellent. Don't feel pressured to buy an airbrush on your first build.
Primer First, Always
Paint doesn't adhere well to bare polystyrene. A light coat of grey primer gives it something to grip. It also reveals surface flaws not visible under bare plastic. Tamiya Surface Primer (lacquer-based, excellent coverage), Halfords Grey Primer (cheap and effective), or Mr Surfacer 1000 are all good options.
Painting Sequence
Paint the darkest or most complex colours first, working up to lighter areas. Mask between colour boundaries with Tamiya masking tape — cut to shape with your modelling knife, press down firmly at the edge, apply paint, peel while still slightly wet. For tight curves and complex shapes, Humbrol's liquid masking fluid is useful.
Decals
Most kits include waterslide decals — the transfers you soak in water briefly and slide into position. Cut each decal as close to the printed area as possible to minimise carrier film visibility. Dip in water for 30–45 seconds and slide onto the model using tweezers and a damp brush. Products like Micro Sol and Micro Set dramatically improve decal conforming over surface details — Micro Set softens the decal adhesive for repositioning, Micro Sol shrinks the decal film to conform to panel lines and rivets.
Common Mistakes to Avoid
- Skipping primer: Paint applied directly to bare plastic chips and peels. Always prime.
- Thick paint coats: Thick paint obliterates surface detail and runs. Thin your paint to a milk consistency and build up multiple thin coats.
- Too much cement: Excess poly cement craze-marks adjacent plastic permanently. Apply sparingly.
- Not reading instructions first: Many interior parts need painting before the surrounding structure is assembled.
- Buying too complex a first kit: An ambitious first build that goes wrong will put you off the hobby. Start with something achievable and build confidence.
- Ignoring mould lines: Mould lines not removed before painting show clearly through finished paintwork. Remove them during the building stage.
- Rushing drying time: Cement that hasn't fully cured can pull and distort when you handle the model. Leave overnight before major sanding or painting.
Frequently Asked Questions About Building Plastic Models
What is the best first plastic model kit for a complete beginner?
An Airfix Starter Set is genuinely the best starting point. They include the kit, basic paints, a brush, and glue — everything you need, nothing unnecessary. The Airfix Spitfire 1:72 Starter Set is probably the single most-recommended beginner kit in the UK. The subject is iconic, the build is straightforward, and it looks great when finished. Browse our Airfix range for the full starter set selection.
What type of glue should I use for plastic model kits?
Standard polystyrene cement for plastic-to-plastic joins — Revell Contacta Professional or Tamiya Extra Thin Cement are both excellent. Use super glue (CA glue) only for non-styrene materials like metal, resin, or rubber. Never use PVA (white glue) for structural joins — it doesn't bond polystyrene reliably.
Do I need to sand and prime before painting?
Yes to both. Sanding removes mould lines and gate stubs that will show through paint. Priming ensures paint adheres properly, reveals surface flaws before colour goes on, and produces a smoother final finish. Skipping either step produces a noticeably inferior result. Tamiya Surface Primer in a rattle can is the easiest option for beginners.
Can I paint plastic model kits with normal household paint?
Not advisably. Household paint is too thick, tends to obscure fine surface detail, and often doesn't adhere well to polystyrene without dedicated primer. Use model-specific acrylic paints — Humbrol Acrylics, Vallejo Model Colour, or Tamiya Acrylics are all excellent and widely available. They're formulated specifically for plastic models and thin to the right consistency for brush and airbrush application.
How long should I wait between coats of paint?
For acrylic paints, around 20–30 minutes between thin coats is sufficient at room temperature. Wait longer in cold or humid conditions. For enamel paints, wait at least 4 hours between coats, and ideally overnight. Never apply a fresh coat until the previous one is fully dry to the touch — running your fingertip gently over an inconspicuous area tells you immediately.
Shop Plastic Model Kits and Supplies at Access Models
Browse our full range of plastic model kits — Airfix, Tamiya, Revell, Hasegawa, and more — alongside all the tools, cements, primers, and acrylic paints you need. All orders include fast UK delivery.