Ive also used the white knigh crystal clear on wall hangers without lifting paint but cant comment on the life with a silver ball on it. I can throw a few balls at my Mata Hari playfield if you like????? 
With a BB gun? 
Shot consists of little round balls, doesn't it?
Unless it's a blunderbuss... (Is that how you spell it?)
Trying to imagine the "dent" from a 1 1/16" pinball at 1100fps...
