i figured out what corroded my sks it was a batery my dad put in my trunk it leaked acid... damn it. where the acid got on it it looks like regular steel not gun metal black. my boss says i should clean it and buy some thing they sell to "blue" the steel. wut you guys think? theres also really smal amounts of rust forming on the rear sight. i also heard there are pretty good clear coats i can put on it after i fix the color any one know any?