Hi guys,
Someone has scuffed my car today!

the rear arch. i think the car in question is white.
i managed to get some of his/her paint off but not all off it.
i was left with a white mark which wouldnt budge, plus i think the arch is slightly dented (or slightly out of shape, not noticeable though).
so iv touched it up with paint for now. my question is, will this now rust?
Cheers
Mac