You can also get Dupont 225S aluminum prep at your local automotive paint store. It is phosphoric acid and is used at the first step of alodining. You can also get the alodine for a complete job, but the acid etch by itself will do a lot for you.
Wear a respirator if you use Alodine. It contains hexavalent chromium and is not something you want to be breathing. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On Behalf Of Doug Rupert Sent: Monday, March 14, 2005 12:07 PM To: 'KRnet' Subject: RE: KR> painting metal parts Go down to the local hardware store and get yourself a bottle of industrial strength toilet bowl cleaner (stronger than CLR) and pour or paint it on the aluminum part. Wait a couple of minutes and flush with water. BTW don't get that crap on your hands, don't ask how I know. Basically a watered down version of muratic acid (the stuff they use to etch concrete). Works like a charm and unlike it's full strength partner will not harm the metal. In the old days we used to use Coke to remove rust from chrome car parts. Doug Rupert -- Internal Virus Database is out-of-date. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.6.2 - Release Date: 3/4/2005
