I’m a new bait maker, and I’m having trouble getting sanding scratches out of my lexan polycarbonate lips. What is the best and easiest way to remove these scratches

I have worked with Lexan in commercial and residential settings for a little over 25 years and, as far as I know, there is not a product to get scratches out of it. We have tried several products over the years with little or no success. You might want to try the stuff they sell to remove the oxidation from headlight lenses on cars. They are generally made out of plexiglass or Lexan. The product works for what it is supposed to do, but the scratches are usually still visible. The only other thing that might work would be jewelers rouge, but I have never used it for this situation before.

X 2 on what Dreveal said. For light scratches, I've used wet sand paper with pretty good results by making circular motions and stepping up to finer grit. 400, 600, and 1000 is what I used and then buffed out with a polish. Mothers chrome polish actually does a pretty good job on Lexan, but deep scratches will still be visible.

You can should try a very thin coat epoxy. It  fills in the gaps and should come out clear.