Would these Mustang 18" rims fit?

For 150 pounds. I say go and buy them. If they fit they fit, if they don't they don't, and you would be stuck with selling them. Since it is only 30 miles away, work out some sort of "deposit" that would allow you to zip home and test fit one wheel. Then you prep them and paint with spray cans. Dupli Color makes wheel paint for the US Market, so I would think that something would be available over there. Depending on the degree of pitting, I'd start with, maybe, 120 grit dry and work my way up to 320 grit dry sandpaper. bad pits could be filled with body filler. Then spray on a few coats of sandable primer and wet sand with 400 grit. A few coats of paint and possibly some clear. They will look great for a lot less than powder coating will cost.