Bruce You are doing it correctly. I have worked with “Plexiglass” since the early 70’s. However you only want to use the least grit paper to get the scratches out, so as to remove the minimum amount of material. I usually start with 1000 or 800 grit to determine if the scratches will come out. I then use 1200, 1500, 2000, 2500, 3000, 4000, and 5000 grit before moving on to polishing. Then you want to use a cloth that is safe for eyeglasses. I have done this many times on motorcycle windscreens and aircraft windscreens. I did it ones on my boat. Now I just take plexiglass polish three times a year to it.
Good luck From: CnC-List [mailto:[email protected]] On Behalf Of Bruce Whitmore via CnC-List Sent: Thursday, May 11, 2017 7:01 PM To: C&C List Cc: Bruce Whitmore Subject: Stus-List Fogged, Scratched Plexiglass - Good home test, now to try it on our companionway hatches... Hello all, Our 37/40+ has tinted plexiglass sliding companionway hatches that look fogged and lightly scratched all over from years of sun. After reading here and other places about potential ways of curing the issue, I ran a test here at home. I have a Ryobi Corner Cat, and grabbed a piece of scrap plexiglass. Starting with 360 wet/dry sandpaper, I wet sanded the nice new piece of plexi until it looked like $#!+. Then followed with 600, 1200 and 2000, then went to buffing compound, and finally to McGuire's polish for headlights. Sure enough, the piece of plexiglass came out really nice & clear. So, I think I'll try it on the sliding hatchboards unless someone here cautions me otherwise. What say you wise folks? Bruce Whitmore (847) 404-5092 (mobile) [email protected]
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