Gel coat technology has come a long way. One challenge is that multiple colors require, depending on the variation, different color mold surfaces. For example, a dark gel coat like black or blue metallic requires a lighter mold surface like orange (to see air voids and lay-up gel-coat correctly. The lighter gels coats like red or silver require a darker mold surface, so factoring that into the equation makes multiple colors possible, but within restricted ranges.

I agree on the body shapes, like a super-modern coupe that may be the primary body for the aero-mpg car, could also be a rock-star wrx candidate... powering decisions involve alot of variables and space considerations but we will of course be reaching far on all of the above.