u/Dependent_Economy549

I have 2 im3100 cases that spent years out in the west texas sun and red clay. I've scrubbed and cleaned them the best I could but they are still that faded grey/black on the exterior. They look showroom fresh on the inside, of course.

Is there a good way to restore the black color?

I'm looking to sell them so I'm not trying to spend a million dollars to make a hundred.

Thanks in advance for any advice!