My 350F tank is sun-faded, etc. and needs a repaint. I used a paintless dent removal kit to remove 3 large dents. Basically, you glue tabs onto the tank with hot melt glue and the tool pulls on them. Start at the edge of the dent and work your way into the middle. Took me about 3-4 hours, so lots of patience required. After I glued each tab on, I waited ~15 minutes for the glue to cool, which takes up a lot of time. Anyway, worked a treat, got them out to the point of needing spot putty perhaps... now I need to strip the tank, the old paint is just too far gone.