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Unread 06-11-2018, 03:41 PM   #82
Bill Graham
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Originally Posted by Harry Collins View Post
Do you etch with ferric chloride or sulfuric acid?
Hey Harry. I just got an old PH today that is entirely brown. Since it couldn't make matters worse, I'm going to degrease it, plug the bores, and then submerge it in a very weak muriatic acid solution to see what it does with the twist pattern underneath the crud. I've used that solution on barrel flats with a q-tip to see what it would bring out, and it could be an interesting experiment. I will post before and after shots here when I try it.

This one is a tight 1892, uncut at either end, and with a fishtail top lever. The safety hardly moves it's so gunked up.
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