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How to duplicate Guillow's kit plastics

The Motivation:
Guillow's kits have good directions that have templates of all of the parts. This makes it easy to replace damaged or missing balsa, or even use your own wood that has characteristics that you desire. Therefore the real value in a kit lies in the directions and the plastics (for builders, not collectors). To a lesser degree, the decals are of value. But since they are often yellowed from age it is common practice to make/paint your own anyways.

Discontinued Guillow's kits like the Mosquito, Airacobra, and B-29 can be expensive to obtain, and since you consume the plastics, you consume the kit. In the case of the B-29 this is easily $100 or more. The goal is to be able to duplicate the plastic parts accurately so that the kit retains its plastic parts and may be resold or given to a good friend for them to build. I suppose you could even make parts for a buddy that has damaged or missing parts.

Not only does this motivation apply to these discontinued WW2 kits, but also to the discontinued WW1 kits.

Method #1 for duplicating the white plastic parts

This method uses a rubber mold and liquid plastic.

Method #2 for duplicating the white plastic parts

This method uses sheet plastic and a vacuum former.

Duplicating solid plastic parts using a silicone rubber mold

This method uses a silicone rubber mold and CR-600 casting resin.

Duplicating the clear plastic parts

This method uses sheet plastic and a vacuum former.


Please email me if you have any questions, comments, or suggestions.

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