California Custom's Aluminium Deoxidizer is a hi-tech acid based chemical designed specificaly to eat oxidation. Use this product to remove scale, road film, acid stains & rust on chrome before pollishing. If after pollishing you notice the finish is hazy or milky you should also use deoxidizer. Once you have applied the deoxidizer, you will notice a considerable difference in the result & how easy the pollihing process becomes. Deoxidizer does not remove any of the metal surface & won't burn or streak. Will cut pollishing time in half. Use with Purple Metal Pollish for a crystal clear shine.