You can clean the wax/grease off of it, then have it sandblasted/powdercoated. There is a shop outside Altoona who does frame powdercoating (they are south of Altoona, in the middle of nowhere - a little bit of a drive, but decent guys). They did Volker’s '64 Cadillac frame for $500 (he brought it to them sandblasted & bare, but all suspension components, rear axle, etc were included). They did a nice job & the finish is very durable. I assembled all the frame components, and was very happy with their work. I know how to get there, but I do not know the shop’s name.
I don’t talk to Volker anymore, but I will try to get the name from someone else. I will email this guy now & see if I get the info. Otherwise, you can call Volker & ask him.