You definitely don't want to blast the anodizing off. I have been Cerakoting as a hobby for years and know the process well. The manual advises just to lightly blast the anodized surface, just to rough it up, with 100 grit AO. Anodizing imparts hardness and I'm sure I read somewhere that Barrett anodizes prior to applying cerakote.What is the Cerakote color code for the MK22? Is it Elite Series? I heard someone say it's "Coyote" but not sure which series Barrett is using.
I have an early model "Multi-role-brown" and the finish is so flawless inside and out, that it leads me to believe it might be anodized instead of coated. Anyone can confirm? I'd hate to blast off an anodized finish.
Based on the FDE that came on my Barrett I am fairly confident they are using the H-series. The Elite has quite a bit more glossy surface and you can't vary the hardener to achieve more or less gloss. I've done quite a few rifles with E-200. If you look at my post with pic on the last page, the Nightforce ATACR, mag, and barrel are C-series (no bake-high heat) FDE and a perfect match to the Barrett finish. The raptor mount, bipod, ARCA rail, bag rider and picatinny rails are E-series FDE. Spuhr mount appears to be H-series and also perfect match.
If you email Barrett, I am sure they would tell you what Coyote it is.