1. In a method for making a three-dimensional checking gage model, for an automobile door panel and the like, having inner and outer three-dimensional variant contoured surfaces, and a three-dimensional variant contoured periphery about said surfaces and connecting said surfaces, the steps comprising: (a) providing a lightweight frame; (b) providing said frame with locating means including locating base means; (c) affixing on the frame a piece of modelable filler material which is pre-formed approximately to the three-dimensional rough shape of a finished checking gage model; (d) modeling the filler material to provide three-dimensional variant undersize finished contoured inner and outer surfaces and a three-dimensional variant contoured periphery; (e) applying at least one layer of a textile fiber material cloth to the undersize finished three-dimensional variant contoured surfaces and periphery; (f) adding a surface coat type material, over the textile fiber material, to the three-dimensional variant contoured undersize surfaces and periphery to make said surfaces and periphery oversize; and, (g) modeling the surface coat type material down to the finished three-dimensional size for three-dimensional variant contoured inner and outer surfaces and three-dimensional variant contoured periphery.