Oh Yea, This is for you.
I recently ran across something called Marine Tex. It has not one time let me down and I'm talking repair as fine as eyeglass frames to molding and actually fabricating machine parts. It can be applied as thin as 1/32 and as thick as 1 1/2 inches. You can mold it like clay or spread it like butter pending on your needs. I've used it on glass, ceramic, plastic,metal, fiberglass and once even made me a temporary new boot sole. They even have one that remains flexable and one that can be applied completely underwater. Solvents grease and oil don't effect it and get this it even adheres to polypropelene or whatever that
plastic is that nothing sticks or bonds to (such as radiators)
It mixes like an epoxy (2 parts) Give it a try and I'm sure you'll be as sold on it as I am. After all this ranting on can you believe I'm not affilliated with it in any way what so ever other than just a consumer.