Depends on the shop, prices vary widely. It can be done for a cheap as 40 per rim and go up to 80 per rim. Call around before deciding on a shop. And make sure it includes sandblasting and all prep work.
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2004 4Runner V8 4x4 Sport
255/85/17 Mickey Thompson Baja Boss AT | Total Chaos +2 front end | Total Chaos rear links | MetalTech rear springs | Kings Shocks | Pelfreybilt Front bumper | Bud Built skids | Stubbs HD-SKO Sliders | WARN ZEON 10S Winch | 4.88 Gears | ARB Locked Front and Rear | etc...
I'm going to paint my stock 97 rims sometime on my own. Christian from yotatech was nice enough to give me a write-up on how he did his, maybe this will save you some bucks. Here's the email he sent me
Got your PM on YT. OK, so here is the basic concept: