I decided to start doing a little work on my chassis construction and thought I should finish up my gas tank and get it mounted onto the frame and get it plumbed in.
I have gone over the tank with fine scotchbrite pads on my die grinder to remove the mill finish and the scratches from sanding the welds, etc. I still have to pressure-test the tank before polishing in case I have to weld some more.
Can anyone offer any advice or methods for polishing a stainless tank? I have a buffer on a stand but I don't think it will work as the tank is too cumbersome and heavy to polish that way, and the shaft isn't even long enough. What are the alternatives? I have the stainless buffing compound. Do I need to sand the tank with fine paper first? It's pretty smooth with the scotchbrite treatment. Would a 7" angle grinder with a buffing pad work or is that too slow? I hate to think I have to use the die grinder.
I plan to add a drain bung and a vent bung, both stainless steel. I didn't think I wanted a tank drain but have decided it's a good idea, even if just to get any water or bad gas out of the tank. I decided a vent would be a good idea too after reading about all the problems filling these cars up with gas and noting the 57 tanks have a vent for a good reason . I plan to weld in a 1/4" NPT bung for the drain, and a 3/8" NPT bung for the vent. I think those should be large enough. I will weld another 3/8" bung into the filler neck somewhere neat the top.