| etching aluminum
Al, the short answer to your question is that sandblasting IS etching. Chemical etching can be done in leiu of sanding (though the finished 'feel' is not the same). If a yard blasts first and still uses a chemical etching - all the better.
After my post yesterday, I read up on the Alumiprep and Alodine products - some nasty stuff. The Alumiprep is a phosphoric acid and the Alodine is a chromium oxide - warnings of chemical burns, blindness, desease. Geez, if you use this stuff, where a rubber suit.
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