Not bad! No way it will ever look like new but you can see through it again(worth doing if you have a hazy Lexan port on your boat).

I used a commercial plastic cleaner recommended by my glass supplier. It's sort of like a fine wax with some petroleum product.

I also used, a good wax. Buffed with a felt pad in a 6" orbital sander. Re-bedded in fresh silicone, 8 coats of varnish(I got tired...). Now for the curbs, which are fastened to the boat(much easier).

These are important parts of our boat. Huge ventilation-reversible, and they can't leak.