Must be a pretty hard coating as I made a couple front handgun sights for my 460S&W out of anodized Excalibur D bars ends. I copied my stock hi-viz front sight that,s spring loaded an snaps in a slot. I just needed a higher front because my rear sight was bottomed out an still shooting high. I made 2 an they fit,look great an now will have some adj on my rear sight. I had a hard time getting thru the anodizing with a file but finally did an easy after that. so now I have fine looking anodized front sights that look second to none.can,t wait to try them but raining out an kind of dark out an not good for open sight shooting.