Coating bare tubing

[Larry Merk]

Originally Posted by Woodfin

Some years ago, we used a kit that was similar to gun bluing to treat, stain, bare tubing. We did a complete dragster and it worked out fine. I do not remember any downside to the process. Like a gun, we would wipe it down from time to time but mostly it weathered just fine. Have any of y'all done this? Do you know the product?

Larry,

Are you referring to "black oxide" coating which is similar to gun bluing? I have never used it but there are several companies that sell kits. Most appear to be oriented toward coating small parts via immersion.
https://www.epi.com/
https://birchwoodtechnologies.com