Don’t reduce the Lexan thickness, fill in the inperfections. Lexan is one tough product to work with. Apply a thin coat of Armor All for automotive dashboads which will fill in the cracks and leave the surface gloss and clear with no scratches, streaks, etc. Would only take a few minutes to do one canopy. Only drawback I’ve found is that is does attract dust over time and needs to be redone every few months.