I've had 'em off, but never painted 'em.
Remove clamps and hanger bolts and remove silencers (mufflers).
Loosen clamp on crossover pipe and remove mounting hardware at rear near outlets.
Remove 2 nuts from header studs and wiggle judiciously. Not you, the headers.....
They come right off.
Replace gaskets on reinstall - install everything loosely - and start tightening from front to back.