Back in '82, I fished an abandoned MT bike out of the local marina. It had been in there long enough that some critters of some sort (maybe barnacles?) had produced a zillion little holes in both tubes. The bike was not so rusted out that it was not ride-able.
Dad ran an automotive repair shop and I had access to the tire gear, including the patches. I pretty much ended up with tubes made out of patches when I was done! Rode that bike for the whole summer.