63 Dart bezels and 3D printing?

Maybe you just need to fill them with epoxy or fiberglass resin. I would coat the inside before doing this with aluminum foil or something. just a thought.
I've considered fiberglass resin for smoother surface and increased durability but haven't tried yet to see if it would eat the plastic. The deflection point of this plastic is 157 farenheit, so might be close for southern states? Again I hope the chrome plating would increase temp range of final product.