If you are apprehensive about various coatings (they do look very nice) on your worn aluminum frame guns, simply have the frame beadblasted and leave it in the white.

There has been a lot of controversy over this, specifically over removing the anodizing and losing the strength of the original finish.

I have a model 39 that was done nearly 20 years ago now, and it's perfectly fine and looks great. Anyone supporting the argument that it damages the aluminum, merely needs to remove their slide and look at the top of the frame rails. Anodizing is the first thing to wear off.

Frame rails still remain fine after it's gone.