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I repaired scratches in my motorcycle windshield, it appears
perfect. But now as I am riding on a sunny day I can see the flaws on the
ground in the shadow of the windshield. So I would suggest as you get near
what you think is finished, that you let the sun or a strong light shine through
and look at the image on the ground. This way you can see where
corrections are required.
Gary Melton
N320GG LNC2
----- Original Message -----
Sent: Sunday, December 31, 2006 5:25
PM
Subject: [LML] Re: FW: Plexiglas - repair
of scratches
One thing to keep in mind is the Plexiglas is really a lens. And
removing the scratch requires almost a "body work" approach. You don't
want to end up with a nice, rounded off, smooth, shiny scratch. A deep
scratch requires you feather the area around it, the deeper the scratch the
larger the area. Since most scratches are on the outside, the convex
side you can use a DA or orbital sander, even by hand with a sanding
block. Just avoid the temptation to dig down into the scratch with a
small sanding tool. Bottom line, to preserve the optical quality of the
windshield you need to work a large area if you have a deep scratch, the
deeper the scratch the larger the area.
I got a fairly deep scratch on the inside of my windshield (don't ask)
and used 1500, 2000, rubbing compound then the 3 stage Plexiglas polish system
and it worked fine. But I can still notice slight flaws in the optical
quality of the windshield in that area. It was difficult to work above
the glareshield, by hand, and get it sanded out thoroughly.
Mike Easley
Colorado Springs
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