There's really nothing new about it. Back in the 70s I was taking Colt Lightweight Commander receivers to a friend of mine (a jeweler) and he would polish the anodized finish off for me. I would then throat the barrels, port and flute the slides, and a few other tricks, put a Smith type front sight (taller ramp) on it, and Bomar adjustable rear. I could sell'em fast as I could build'em.