The best way to remove anodizing and leaving the aluminum finish in perfect shape (as it was before anodizing) is to use this solution. You can buy this at a chemical supply store. This is an actual ASTM procedure for testing the quality of Anodic Coatings on Aluminum.
Just do it in a safe area, not the kitchen and wear approved gloves and respirator from a safety supply store.
Start with 3.5 litres of pure water
add 140mL of Phosphoric Acid 85%
add 80 grams of Chromic Acid (Chromium Trioxide)
stir and add pure water to make up 4 litres of this solution.
Heat the bath solution to 190-200 degrees F
15 min soak and done. Rinse well in pure water bath and rinse under running tap or 2nd clean pure water bath. Anodize Stripped off. Finish underneath intact. If it was polished or machined a certain way it comes out that way just before the anodize process was done initially.
Remember pure water is distilled or reverse osmosis type water so you don't get spots etc.
Phosphoric Acid is like a syrup, clear maybe about the viscosity of Associated Silicone Shock Oil 60-80WT or possibly heavier, and Chromic Acid is a solid chip type material burgundy and brown and redish in color. I called it bacon bits as you can do a very bad thing by putting these crushed up into someone's salad or sandwich! Never do that! But if you'd see the stuff you will think the same!
I did a lot of anodizing for my motorcycle and friends and this is the best way to strip anodizing. I don't have the setup or the chemicals anymore myself. Might be best to bring to an anodizing shop that does custom work so they can change the color for you. Because doing a new anodize finish is a pain. Must have proper equipment and process.
Yokomo BD7 2016, Tamiya TRF419, Xray X12 2015, Associated B6, B6D, B5M Factory Lite, B44.3, RC8B3, RC8B3e
My Outdated R/C Car collection:
Associated B44, Associated NTC3, Tamiya TRF415, TRF415 MSX MRE, TRF416X