[Brent Deines]

I worked in the same kind of temperatures in Montana. Can't say I've ever seen my pit fail, but the surface does show wear over time. I have seen pits that others have done fall completely out, but I always attributed that to poor resin quality as the bond between a good resin and the glass is very strong.

Rain-X and other coatings can weaken the bond if the surface is not properly prepared.