Originally Posted by
pierce
those things were made from gas pipe gauge steel. sandblast the frame til its shiny on the outside, if you don't see any actual perforated holes, primer and spray it with color of choice, slap parts back on and ride it for another 50 years.
Having worked with galvanized gas pipe I doubt a bike would have tubes that thick. As with cars the worrisome rust works it's way from the inside out toward the painted side.