Pearl grey effect my opinion is you will just make a mess where would you get the touch up paint unless you know a motor accident repairer, flat water based colours no problem and metallic should not be problematic as these are readily available on Ebay. but I pearl I have my doubts. good luck anyway.
I think this should be corrected without removing anything by an expert in very short time, he would have a press to rectify it if it is as you state only minor.