Reverse Vacu-Forming

The detail is actually a little crisper on the inside (the side next to the shape you vacuform over) than it is on the outside. Almost all vacuform kit makers use a mold with depressions in it so the exterior has detail like panel lines and the gap between fixed and moveable surfaces - it is a harder mold to make than one with a lump or lumps on it. The lump would provide better (but not resin quality) detail on an interior part that is concave.

Thanks for the input. The aircraft i'm working on is in such large scale that if i go through with this, i'll be using 2 large sheets of styrene to accomplish what i'd like to do. The plus side i would imagine is that the aircraft has windows down the side which 'should' allow the plastic to pull down a lot better.

I've formed normal items with detail before, but never tried forming a 'bowl'. Guess it'll be trial and error.

Thanks again!