Unless they are the 15's, chroming is more money than they are worth. I did a set with spray paint a long time ago and they weren't too bad. They were painted 14's and came with all of the trim pieces, center caps, etc. I sanded them with Red Scotchbrite pads and primed them with spray cans and painted them with a can of touch up paint. Rechroming is very expensive as they need to be stripped, de-rusted and then copper plated, the copper has to be buffed to remove imperfections ( like sanding Bondo and primer/surfacer in bodywork) several times then nickel plated then chrome. If they are cheap enough and factory chrome 15's , I'd buy em and sit on them because of their rarity, but there are cheaper alternatives for nice wheels on a G body in that size.If they are the painted 15x7's from a 70's car, you could clean em up and paint em and have a nice enough set of wheels for cheap. By the way, the only thing that is actually chromed on the painted wheels are the center caps, the other things are all polished stainless. They can be repolished if they are in decent condition.