I've been pondering doing the tent-self spray myself too. I was planning to use my compressor, but the electric one seems a pretty good idea too, so thanks for the tip on that.
So tent like 3x6m outside, tarpolin under there, seal the whole place against the weather, use a big fan for extraction and a filter on the other side of the tent. Full face mask. For curing I've got a 1000W halogen lamp that will probably be perfect.
Where do you guys get the paint from? Clear coat? online?
Basically, what would be the best bulletproof sandwich you would go for, if re-spraying all the panels?