tool "bluing" as in gun blue ing

[LinuxRandal]

Going through an old box of tools (used to be a hand tool foot locker, going to make it that again and store my handplanes in it), I came across gramps angle gauge (censored, needed it two projects ago). It was blued, with some light surface rust. I cleaned off the rust, and it brought it down to straight steel. My father saw it and asked if I knew of anyone who used bluing on tools, as he has an old clamp that needs some sort of coating (he thinks wax would be a bad idea since it will be used on unfinished wood, just before finishing).

What do you all recommend?
Thanks again

[cabinetman]

"Gun-blue is a process that is a black oxide treatment, sold in kits at gun shops or metal supply outlets. There is a cold process that is very easy to use and it's not expensive. It may take more than one application and it may turn the metal into a darker hue.



"I'M NEVER WRONG - BUT I'M NOT ALWAYS RIGHT"

[wardprobst]

Powder coating would be an alternative also. Cold blueing does not wear very well in my experience unless you keep it oiled which would not be good for unfinished wood either.
DP

[ironhat]

It would be worth it just in a sentimental sense to take it to a full-service gunsmith and ask if he will do a hot bluing process on it the nest time he has a couple guns to do. It's probably going to be more than you want to spend but if you do the prep work and all he needs to do it immerse it you might get away inexpensively.

[dlminehart]

I've not found bluing to be that effective, unless you keep it oiled like DP says. Fingerprints, in particular, quickly turn to rust spots.