Did something very similar to my own, same spot too. Took it to a bodyshop, paid just under $50 and they buffed most of it smooth, for the slightly deeper scuff they suggested trying to fill it in with touch up paint, layer by layer. They said because the plastic is naturally black it'll work better on a black car than another colour would.
Trying it this week, if it works I'll post a pic, so you can decide if that's worth trying.
Their other option was a full replacement, way too much $$