Just inherited a 4516-2 and I would like to freshen up the finish. It has a few light scratches and some carry wear. Any one know what S&W used to finish it? Bead blast with what?
For stainless revolvers and pistols, I have been blasting with aluminum oxide, #120. I don't know if it's the media I've been getting, or all others are the same, but mine come out with an attractive grey tint.
Where is a good source to get the aluminum oxide media you are using?
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I've ordered it on-line through Amazon, bought it at Harbor Freight and bought it at hardware stores where welding and bead blasting supplies are found. It works well, doesn't promote rust and removes rust and bluing rapidly.