I have been kicking around the idea of setting up a small parts bluing operation for several years. I have been studying it off and on all along and still thinking about it. The up side is I can fab all my own equipment, including building my own burners for the tanks. I just don't know if there is that much of call for bluing. One guy I spoke to said there is - and mostly for NON gun items but for other metal parts and thought that would be a better direction to go - with gun parts as an 'on the side' activity. Anyone have experience with this? Waste of time? Plausible idea? Please advise.