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I did it with battery acid. It works pretty good. The acid got weaker as it was being used. It workEd faster if I heated it.
sometimes it cut the metal in strange patterns.
The inconsistency of where the material is removed is what bothers me the most. It becomes a gamble at that point.
These chemicals are not strangers to me as we use them in the HVAC industry. While safety and proper handling is a concern anytime acid is used there are still many variables in this process that I'm not sure can be controlled. Horror stories as Hemicop pointed out do exist because of the variables.
I started this process and posted my findings because it's a cool concept and can be a neat way to lighten your car while maintaining a stock appearance as others have done in the past.
If I can do it myself, it looks like it would be a cost effective and viable option. If I can't control the material removal, I don't know that I want to play. My  .
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