...About those "imaginary" compressor explosions....

I have tried to weld up pinholes before. It don't work.(for very long anyway) You seal that one and just hear all the rust popping and cracking around that point (partly due to the overall deterioration that cant be seen, added in with the "heat effected zone" around any weld).
I have however, taken 2 compressors and made 1 from them before and it involved my welding the "motor mount plate" from the compressor with the pinholes to a tank that previously had an "oilless" pump and motor combo that let its smoke out. About 8 years later still so far so good.... the pin holey unit was a wheelbarrow twin tank, "hotdog" style taht is/was gas powered by a 5hp Briggs.... the oilless POS was a typical big box unit but its tank was something like 12 years newer than the tank it replaced.
I use it as a "back up" unit, right now my son has it on a long term "borrow", he mostly uses it to air up a tire now and then.