WWYS, I have a small collection of these Colt .22 NFs but on this particular gun I think Buckspen has as much knowledge as anyone here. Dfariswheels knowledge of gunsmithing and a broad range of firearms is unquestioned so, I guess I have a question for them and to bring out info to you at the same time.According to Don Wilkersons book," Scouts ,Peacemakers and New Frontiers in .22 Caliber" he states in several places, that the grip frames are,"finished with an epoxy blue".[this for the "G" Series guns] and,"Grip frames were generally a bright epoxy blue on revolvers with case hardened frames and a parkerized finish on full blue revolvers",this on the GS Series guns with crossbolt safeties]. I have one case hardened GS and several G Series guns,both NF , Frontier Scouts and one Peacemaker. All appear to have "painted" grip frames.Now, I don't think they are "anodized" as in Commanders and Ruger SAs but I'm no expert. I bought 2 grip frames several years ago from Numrich and modified one into a "birdshead". With the application of heating torch the finish seemed to me to burn unlike anodizing so who knows. I'm hoping Buckspen can provide better info and educate me. Meanwhile, I used an automotive epoxy paint on the grip I modified and it worked fine but, now a days I would follow dfaris' advice and go with Lauer Duracoat because of the durability and great range of colors. BTW: I'd leave yours alone and just enjoy it.Best Regards, Nick