Scratches on inside of waterproof housing, HELP!

Hey, the stabilization plate popped loose in my housing (not entirely sure how), while we were filming from doubles, and it scratched up the inside of my housing, resulting in a bunch of small scratches and one big scrape that makes a huge blurry spot in the video. How can I buff it out or what should I use?

Try going to an aquarium or fish store. They may have something used to buff acrylic aquariums that would work. Just an idea.