A bit of background: have a 34 Chevy Town Sedan that is unlike a regular 2dr or any other body style. Needed inside window garnish moldings that seem to be extinct. Made up a set with fiberglass which come out quite good but they don't have the 3/8 lip around the back side that seats against the upholstery. Now for suggestions; I can't glass a lip without something in the concave channel to support the glass till it sets up. Whatever I use it will have to set up hard and smooth and then dissolve in water to remove from the channel. My thought so far is to use a hard candy like peanut brittle without the peanuts. Better ideas are welcome; thanks.