I recently built my own target out of this styrofoam stuff and when i shoot it, it leaves lines of plastic on my arrows. Well the target basically go shot through in 500 shots or so and I am finally just going to break down and buy a black hole or block. Well I got most of the plastic of with a credit card, but there is still some stuff on it. If i use nail polish remover on this will it harm my arrows? Any other suggestions.