Here is the best trick ever for cold bluing compounds- apply it with a toothbrush, and really scrub it in, just keep scrubbing it into the steel. It gives a much better coverage than wiping it on, you have to try it to believe it! I've never tried getting the metal really hot, so can't comment on that. Of course, if you use a toothbrush you probably won't need to LOL.
If attractiveness is your main concern, hot-blueing or slow-rust blueing is the best way to go. 44-40 does a lesser job and Oxpho-Blue doesn't cut it.
For durability, I give the nod to Oxpho-Blue as it seems nearly impervious to the elements and costs much less than hot blueing.
Thru trial and error, the Oxpho-Blue Creme (there's a liquid form I haven't tried) seems to prefer some steels over others. I was able to get my USA made drill bits black, but not so successful with my firearms. On larger areas, like a handgun slide, there was an annoying electric-bluish sheen when held at an angle to the light. Not very pretty. (More on that later) I would use Oxpho only for covering up blemishes, scratches and items where looks don't count for anything.
Oxpho-Blue is VERY durable. I blued a pair of pliers that I use for saltwater fishing over a year ago and not a speck of rust has shown up yet. Dings don't seem to affect it as its just thrown into a tool box. I don't even bother to wash it off or re-oil it since it is Chinese made and easily replaceable. It too has a bluish sheen when held at an angle to the light. I don't think you want this for a firearm.
The ad in Brownells says that enough coats of Oxpho will cause water to puddle on it. I have found this claim to be absolutely true.
I use a hairdryer to heat whatever I'm cold blueing.
Use brake cleaner, rubbing alcohol or whatever degreaser you have on hand. Any oil present, while applying Oxpho, will slow down the chemical reaction, thus increasing the blueing time. Toothbrushes, Q-tips, a clean cloth and some OOO and OOOO steel wool are what I use to apply any cold blueing.
Apply the blueing in a well-ventilated area and wear gloves and goggles.
The handgun slide was re-done in 44-40 after an arduous process of removing the Oxpho-Blue first. It now looks ALMOST as good as new. Don't know about 44-40's durability as its been only a year and I don't abuse my guns like I do my pliers!
I use the same procedures in applying 44-40 as I do for Oxpho-Blue.
1) It works best over matte finishes.
2) Get it clean. Ignore what it says on the bottle about applying through oil.
3) Completely degrease the object. Degrease a full pad of 0000 steel wool.
4) All of the rest of these steps are best done in a big industrial/garage sink. Wash the object in HOT soapy water. Dry it off quickly, to keep it hot.
5) Put on a pair of throwaway rubber gloves.
6) Pour a little OB (two tablespoons?) into a saucer. (I add one drop of Dawn to a pint of OB, it seems to wet better.)
7) Using a piece torn off the steel wool, apply the OB as evenly and rapidly as possible to the entire surface. Keep the entire surface wet with OB - never allowing it to dry out. Scrub over the entire surface as many times as you can stand it, rewetting the steel wool often. The steel wool will disentegrate and the OB will get contaminated with it. When you think one or both are used up, turn on the hot water and wash the object again, scrubbing with the remnants of the first piece of steel wool. Quickly dry the object, then liberally douche with WD40. Inspect.
Repeat the above steps until you like the results. A key is not to let the stuff ever completely dry.
From a bead blasted starting finish you will get an inky black matte finish on most steels.
I like it because I can repair/reblue after every season, and my guns usually need at least a tuch up. It is a great working finish, as it will NOT rust. (No, I never hunted SE Alaska!) It will still protect the steel even when worn down by handling to just a faint gray film.
{All I've ever used is the liquid form, just read a concurrent post about a cream.)
Don
[This message has been edited by Don G (edited 01-06-2002).]
(1) Sandblast the exterior. (protect the bore & chamber from the sand)
(2) Prime with Rustolium primer.
(3) Spray paint with flat or satin finish
EPOXY paint the color of your liking
This is a cheap, quick & easily restorable finish for what I call a knock a round truck or boat gun. Im not suggesting doing this to a high dollar gun here folks!
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NRA Life member