Hi, I recently installed the Caractere Diffuser. I quite liked the matte black color it came with, so opted to not paint it. Now there is a slight problem the housing surrounding the exhaust has started to get rough and show some white marks. is this from heat damage? I learned that the matte black is just a primer not a full coat... this is quite problematic. What do you all advise I should do. Below are some pictures of the stated surface damage. Thanks all!