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From: bobc@hplsla.UUCP (bobc)
Newsgroups: net.cycle
Subject: Re: Splotchy aluminum parts!
Message-ID: <19500002@hplsla.UUCP>
Date: Tue, 30-Sep-86 11:00:00 EDT
Article-I.D.: hplsla.19500002
Posted: Tue Sep 30 11:00:00 1986
Date-Received: Sat, 4-Oct-86 09:05:51 EDT
References: <1346@drutx.UUCP>
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Nf-ID: #R:drutx:-134600:hplsla:19500002:000:1137
Nf-From: hplsla!bobc    Sep 30 08:00:00 1986



>the underlying metal, but I did observe fine scratches in the
>surface.  I'm not sure whether these scratches were the result
>of factory finishing work, or damage caused by etching of the
>surface by the stripper.  I called a corrosion expert at

If your worried about about a little etching, then you probably
don't need to remove the clear finish in the first place. I removed
the coating so that I could get at the corrosion underneath. It
was pretty bad in places.  I wasn't worried about about harming
the original finish because  I knew I had a lot of polishing ahead
of me anyway. 

Once I removed the clear coat, I used 600 wet/dry sandpaper to polish
out the corrosion and get the entire surface to a uniform finish. Then,
using emory cloth, followed by automotive and aluminum polish,  I was 
able to create a mirror finish.  It was a lot of work, but the results
are impressive.

Obviously, the amount of polishing you have to do depends on how deep
the corrosion is.  Also, I wouln't remove the coating to do spot fixes.
It could be difficult to match finishes.

Bob Cutler  hplsla!bobc
Hewlett-Packard
Lake Stevens, WA