[Frodo]

Originally Posted by Nine8Six

^ this, if its badly scratched

Been testing the equivalent of your infamous Made in USA Novus 1-2-3 on acrylic here.
e.g. Novus Plastic Polish Scratch Remover Cleaner Kit 1 2 3 2oz Bottles 1 Each | eBay

BTW...this stuff works well on the vinyl back window too. Working on it about a month ago, got mine (now 13 years old) looking virtually transparent again. Gotta do the inside as well as outside.