I purchased a new Knights Armament 7.62 MM MAMS kit. The finish is pretty bad and I would like to get it cleaned up and refinished for a new build I am doing. I will also be running a Knights CRS/QDC suppressor that of course attaches over the MAMS. I want to finish it in black and am wondering what type of coating/finish I should get since it is steel. Parkerized, Nitride, Cerakote, etc. What will hold up the best with the added heat when I run it with the suppressor? Thanks in advance.