How to Best Restore a Grille for 69 Dart

You can polish forever and not make a significant improvement unless the anodizing is stripped off first. The most straight forward way I know of is to use oven cleaner (Easy-Off). A lot of work later with a polishing wheel and jewelers rouge, you'll have a shiny piece. Once shiny, the piece needs to be re-anodized quickly. Otherwise, oxidation will begin to dull the finish.

After almost 400 hours on the tail panel piece between the lights below, I took it to a professional shop for a re-anodization (~ $40.00). The process clouded the panel a little bit. The clouding would only be noticeable to someone who had seen the panel before it went into the shop. Since I did this, I found that it is possible to do this kind of work at home.

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http://www.ehow.com/how_6399414_anodize-aluminium.html

Check out these two links above for more info.