Hi everyone, my first post!

Anyway, i was doing a roofing job (ripping off and replacing shingles) with my dad today. We were pushing the old shingles off the roof into a dump truck and some of the singles knicked the siding leaving black streaks. So we dont really want to spend money out of our pocket to replace all of this siding so i was wondering if there was anything that would clean the marks off of metal/plastic? siding. We tried gasoline but that just smeared it around making big brown blotches.

Any suggestions would be great! Thanks