K's radiator repair, plainfield nj. will boil and clean and seal. offered to do my 46 pu tank for 160. would definately done it except i dont have a bottom to my tank as i just pulled it and found it gone. they did my rad/chipmonk condo for 150 and it is now cleaned sealed and painted w/ 95% flow. great people.
have heard bearings/bbs are better than nuts and bolts. kerosene is a great cleaner. a few straps and a cement mixer and you have a great cleaning system.