I have done something similar to several old Stevens triggers, that were so bad in "stock" condition that I considered them useless, so I decided I had nothing to loose if I ruined them. I ground off the black, re blacked with Magic Marker, and ground off 3 times until I could get the trigger to break properly. I then lubed the surfaces with #2 pencil lead. That was several years ago, and I have not detected any wear on the surfaces.

If you just keep a eye on what you have done, any wear will show up easily enough. I think maybe surface hardening may be deeper than many of us suspect, if in fact, it is needed at all?

Good Luck-and let us know how it works out for you.......Jim