Re: windshield
I have a plastic (acrylic) windshield on my 1970 Wilker boat that had lots of small scratches. So bad in fact that it was like looking thru fog, especially on a sunny day.
I bought a product (can't recall the name right now) that I used with my electric buffer and the results were amazing. I would estimate that 90% or more of the scratches were buffed out. I was very happy with the results.
I will take a look in the shop tomorrow and post the name for you.