I'm looking to have some stuff powder coated and want to use someone who does a good job and is reasonably priced. I'm in Orange County, but would consider heading up to L.A. or down to Oceanside / Carlsbad area.
Olympic Powder Coating in Santa Ana. They're right around Dyer and Flower St. They do great work. I've tried other powder coaters, these guys are the only one that didn't come back with orange peel. Done right the first time every time. They've done several hundred dollars of work for me and none of it has ever peeled, cracked or anything. I highly recommend them.
I've heard good things about Olympic. I go thru my buddy at Rainbow Polishing in El Monte and also Inland Powdercoating in Ontario. A little bit further then the others. But just some more places to look into.