:then I'd look for another paint guy. Even if you are going to supply, i.e. :purchase the paint, a quality painter should tell you how much and what type :of paint/clearcoat to buy.
My paint guy is not cheap.He's a really good friend of the family who owns his own shop.He has not seen my car therfore could not tell me exactly how much paint to buy.I was just trying to get everything he would need before he started the job.