I second the hard chrome alternative. Hard chrome is so exceptionally hard that its bonding to steel exceeds the bonding of the steel to itself. It's very thin, and yet people have tried to file the finish off and all it does is ruin the files. I had my Beretta 70S hard chromed by Mahovsky's, and I have to keep beating people off to keep them away from it. I've also had numerous offers to buy it. Mahovsky does a fabulous job and several weeks after I sent it to them, Ron called me. Fearing something was wrong, I called him back and he said, "Yeah, I just wanted to tell you that we refinished your gun and everything's fine; it looks beautiful. But I thought I'd call you and tell you that you've got quite a gun." I'd sent the gun to him with a near perfect blue finish. But I had a spot on the right side that kept turning reddish. I polished it with leather and oil, but it kept coming back. I told him that was my primary reason for sending it in and he told me that the spot plagued just about all of those guns. He didn't know why, but he'd seen the same pre-rust spot on other guns just like it. So he polished it out, refinished the gun and a few days later I got it back and it looked like a stainless gun.
Before:
After:
I heartily recommend Mahovskys work. Its prices are reasonable and the people there take pride in their work. In many cases they can plate the inside of the barrel too, and that tends to stop wear and tear in the lands and grooves. I recommend the hard chrome process Metalife for parts that otherwise suffer from wear. For example, if you have a Colt Python, the pawl, or hand, wears very quickly because of its small size, throwing your gun out of time every couple of thousand rounds. By plating the pawl (and the ratchet, if you wish), you can stop the wear and it will save you a lot of money in retiming your gun.
In my opinion,
Metalife (SS Chromium M) is the ultimate finish for any firearm. Because of its ability to molecularly bind to the steel, it isn't just poured onto the metal, it becomes part of it. It also doesn't fill up the lettering on your gun or make it appear as if it's been refinished.
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