The dried finish is very flexible, too. I had some "skin up" on the dip tube lid. I let the lid dry for several weeks after cleaning out my tube and then commenced to peeling the "skin" of Pro Fin from the lid. I was really impressed with the way I could bend and fold it with no cracking.
I have only ever used Pro Fin for arrow finish and it has held up to almost daily shooting, shots through different target materials, sage brush and dirt. Glad you like it, Jon. It will serve you well for many years.