Quote Originally Posted by UrbanWolf View Post
I just got a set of P&S product M4 rail (another contractor that makes the same thing as KAC rails). The finish on the lower rail appear to be faded, like a purple color instead of black.

I want to try refinish it with Rustoleum high temp, how well will it work?


(pic of similar parts from the internet)
give it a shot of oil , let it sit a few, then wipe. You might bring the finish out by doing so. Years ago a lot of upper receivers had the purplish tint, soaking it in oil brought the blackish color out, sometimes.