Hi Myles,
Rubbing compound works on lightly oversprayed bits and lacquer thinner works for heavy stuff, but you must be careful and not get it too wet, just get a rag damp, when you get finished cleaning use the compound to shine it up. Don't use a real heavy compound. If you are real good with a buff wheel and liquid car wax that also works great, but be sure and try it on junk first as it requires a slight touch not to melt the piece.
Wayne