I have my own tanks but do not do allot of parkerizing now, I use stainless steel tanks taken out of a local jail kitchen. Cost is to much for one rifle at a time. If I get 3 or 4 close together people want the parkerizing done then I will do it. I do it in light green, dark green and Dark black, I have had a few that want it done in light black but I have not worked it out to do the light black yet. I also do a bake on grease to the finish that helps in the finish, it keeps helps in the rust prevention of the finish,( it does not change color or finish in any way) It was learned from a guy who did finishes on our weapons during WW2 and he was a great teacher on putting a lasting finish on these weapons and old workhorses.
Lou
Lou
