polishing out scratches?

[Monyx]

Some fucktoid scratched my rear seat cover today while bike parked all day at work. It's mostly cleaned with bit or cut and polish, I'm just anal and want it back to new! Any advice, the problem area is obviously more than scuff, a little scratch into the plastic, but not deep.
Geezus this pisses me off, I arrive at 7:40am and park well over to one side, right close the gutter in a street bike-parking bay. seems like rack, indicator or something from someone's heap.
Mark