I'll basically echo the other folks here.
Get some good airplane paint stripper, squirt it on, go drink a few, hose it off, repeat as needed.
Just might want to do it out in the desert where the EPA won't see you
Seriously though, looks like Mother Nature has got a head start on it for you. If there aren't a bunch of big dents, I'd sure go $1000 for it.
Best of luck!