The frame has been heavily repaired and straightened. There were many hols drilled in the frame by a previous owner for some reason. Not only were they ugly they had potentially weakened the frame. So they were welded up before the frame was blasted.
Here is the frame before welding.
And here it is after blasting, being prepared for painting.
Tailpiece and sidepanels primed and ready for paint. Tank just back from the blaster. No rust or perforations, excellent. The tank will be sealed inside with an ethanol resistant resin before painting. I do this with all my tanks, it is good insurance, plus it's best to be done before painting as acid is used to etch the inside of the tank.
Here's one I prepared earlier, as they say.