Yeah just leave it mate, I remember the first time I scuffed my splitter, I thought damn, i'll have to buy a new one, then I done it again and thought it's lucky I didn't buy a new one before. Now I just accept the splitter gets more fooked up pretty much daily. One of the worst was a multi storey car park, I got to the top with only very slight scuffing, coming down was a different story, crawling at 0.1mph whilst gritting my teeth on every slope. Simply not worth the effort in painting it IMHO.