Sent you an email this morning bud. Hope what I told you helps. I've also heard great things about EMBEE, but I've never used their clear. I have a set of 15" Artillery wheels over there right now being powder coated. I'll let you know how they turn out.
The powder coat clear on our Rushforth's have been holding up great, but like anything, its dependent on the customer's application and expectations. We recommend it for the daily driven cars, or the track cars, but for the show pony cars, I always say its unnecessary.
Let me know if we can help out any.