HEy guys, how does bondo hold onto to this paint? I was bondo'ing a small area on my door when i accidently dropped a small piece as i was waking away and didnt realize it till today and trying to take it off is not even possible its like ROCK HARD and wont scrap off, i read somewhere on the net that when repairing RUST, they suggested to wire the rust down to metal then prime, paint rustoleum over it and then put bondo on top o.O Sounds wierd but it seems to not wanna lET GO off of my car so since my car is pretty much a ABUSE car i had small nickle dings here and there which i have applied bondo to and smoothed it out, and it doesnt wanna come off either, will post pics later.