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From: donch@tekirl.UUCP (Don Chitwood)
Newsgroups: net.cycle
Subject: Re: Splotchy aluminum parts!
Message-ID: <176@tekirl.UUCP>
Date: Mon, 8-Sep-86 20:10:21 EDT
Article-I.D.: tekirl.176
Posted: Mon Sep  8 20:10:21 1986
Date-Received: Wed, 10-Sep-86 02:11:57 EDT
References: <1226@utastro.UUCP> <1184@ttrdc.UUCP>
Organization: Tektronix, Inc., Beaverton, OR
Lines: 15


A word of warning here from sad experience.  Splotchy aluminum parts can
be the RESULT of using some cleaners, namely the popular 409 household
cleaner.  Be aware that most household cleaners are alkaline.  Alkaline
solutions will etch aluminum,  and can leave a residual pattern that you
can only remove by some abrasive technique.  I found 409 to be great for
taking off disc brake pad dust on my forks and rims.  Unfortunately, my
rims are Borrani aluminum alloy rims and they will forever show the 
splotches where I first sprayed the 409 and took ten seconds to get a
sponge before spreading it around; the etching occurred very rapidly.

As a result, I don't use it anywhere on the bike.

Don Chitwood
Tektronix, Inc