How to deal with pitting and how much is too much?

[mvray]

Hello
I am new to the group, so I don't know where everything is yet. I am interested in your description of Metalizing below. I sprayed quiet a bit of Chromalloy 20 years ago, but that was powder. You are saying this is rod, and it builds up with 4140? Where do you get it, and where can I get some data on it. I have a couple of "Frankenlugers" I am going to put together from receivers I have recently acquired. Two of them have pitting and I would be interested in getting rid of it if I can. I am hesitant to use any of the products I am aware of, the metilizing powers I used were aluminum nickel alloys, and just a straight welding build up would be with welding rod and I don't know if the finishes would match.
On an similar note my Father brought home an Artillery from WWII. After the Bulge he was put on light duty in an Engineering unit machine shop (he froze both feet) where he learned to Metalize. For some reason he built up the entire barrel, I never thought to ask why. And of course it is too late now. It is amazing how often I have wished I could say "you remember all that stuff you tried to tell me when I was 17 and already knew everything... I don't guess I could get you to repeat some of it..."

Thanks

Marcus

Originally Posted by Hawkeye

The Metalizer i posted about is a wonderful way to restore a pitted Firearm .
The shop i know of that uses this machine for industrial Pump Parts also gave me some Hydralloy ,.it is similar to Nicklealloy or Chromealloy type Rods in that it has the Flux made onto the rod.
With an Acetylene Torch i didn't have to even get the Metal all that hot , Its a flowing build up process not a welding process.
In other words it builds up surfaces so they can be Milled down to Spec once more. Like the Back Plate on a Mission centrifugal Pump .
The rod i was using was 41/40 steel ,i was eliminating pits on a C96 and i spread the Metal so thin i used Files to shape the Frame up like new.
If you clean the Parts good enough this stuff will just flow into a pit and harden as soon as you move the heat off it.
The Machinist said this is how it has been done for years and it wasn't anything New . Their is even a Bauxite mix that you can use on Aluminum also , but you better be good at Brazing with a Torch to use any of it.