Kitbashing models (custom mixed kits)
CostLow to Medium
Includes: Source kits from charity shops and online joblots, styrene putty and primer Example: Source kits cheaply; styrene putty and primer €15-25
What it is
A spaceship that never existed can still look utterly real, and the secret is usually that it is built from parts of things that do. Kitbashing scale models is the practice of combining, modifying, and merging components from multiple commercial plastic kits, aircraft, vehicles, ships, figures, into custom builds unlike any single kit's intended design.
It treats kits as a parts library rather than a finished product. A tank turret meets an aircraft fuselage meets a ship's railing, and the result reads as a coherent machine because all the pieces share the same mechanical visual language of greebles, panels, and rivets. The discipline is in selection and blending, making disparate parts look like they were always meant to fit together.
The technique has serious professional roots. The starships and alien vehicles of the original Star Wars, Blade Runner, and Alien were largely kitbashed by professional model makers, who raided shelves of commercial tank and aircraft kits for surface detail. Knowing that history changes how you look at those films, and it is part of why the craft carries such respect among modellers.
How it works
Cutting before planning is the error that wastes good parts. Sketch the intended design first and work out which proportion of the build comes from which donor kit, because once a part is cut from its sprue and modified, there is no putting it back. The builders who treat kitbashing as improvisation tend to ruin two kits before they get one result, while a rough sketch keeps the parts library intact.
Assemble that parts library deliberately. Buy old, damaged, or cheap kits specifically for their components rather than to build as intended, and study how parts across different scales might combine. A 1:72 aircraft engine nacelle becomes a 1:35 spacecraft thruster. A 1:700 ship's superstructure detail becomes texture on a 1:144 building. The eye for cross-scale potential is the real skill.
The joining work has to hide the seams, because a kitbash that shows its joins reads as broken rather than custom. Cut cleanly with a razor saw, fill the seams with styrene putty or a two-part filler like Milliput, sand smooth, then prime to reveal any flaws the bare plastic hid. Rescribe panel lines across the filled join so the surface detail runs continuously and the two parts read as one piece.
Benefits
What you need
Here's what to gather before you start. The essentials are marked.
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FAQs
Combining parts from two or more model kits to build something neither kit makes on its own. Take the hull of one ship, the towers of another, and you have an original vessel. Sci-fi modellers do this constantly to create spaceships and mechs that exist nowhere else. It is the core skill for anyone who wants a model that is genuinely theirs rather than a faithful copy of the box art.
Usually yes, or at least close enough that the eye accepts it. Mixing wildly different scales looks wrong fast, though sci-fi and fantasy give you more leeway because there is no real-world reference to violate. Within realistic subjects, keep to one scale. A useful starting tactic is buying two cheap kits of the same scale specifically to cut up, rather than sacrificing an expensive one.
Plastic cement for plastic-to-plastic, super glue or epoxy for mixed materials, and putty to fill the gaps. Where two parts meet at an awkward angle, you pin them: drill a small hole in each part and glue a short length of brass rod between them for strength. That pinning trick is what stops kitbashed joints snapping under their own weight, and it is the technique most beginners do not know to use.
Filler, sanding, and rescribing. Fill the join with a putty like Tamiya or Milliput, sand it smooth through progressively finer grits, then rescribe any panel lines that the sanding erased using a scribing tool against a steel ruler. Priming the whole model one colour afterwards unifies the mismatched plastics so they read as a single object. Skipping the primer is what leaves a kitbash looking like glued-together scraps.
A simple kitbash is fine for a beginner; an ambitious one is not. Swapping a few parts between two compatible kits teaches the skills gently, while trying to fabricate a complex original design from a dozen kits will frustrate you early. Start by combining two kits in an obvious way, get comfortable with filling and sanding seams, then grow more ambitious. The skills stack naturally if you do not rush the jump.
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