Personally I'd be worried about getting a car sprayer to do it, usually they struggle with small intricate things like bike frames, if for no reason than their sprayers are too big to get into all the tight spaces on a frame. Usually the guys are very experienced with flat surfaces but find tubing difficult.
I am going to see the guy on Friday and I will grill him about what experience he has. I will also get a look at the sprayer he's using. The person I spoke to needed to speak to him specifically, so he may be a bike enthusiast, but I will have to find that out when I get there.
No matter how bad it gets... it could always be worse.
1996 Orange E3 - A601
1996 Orange P7 - A602
Repairs: All the various bikes of my 4 children and various nephews and sons of friends, etc. - Just give me the cape and call me "Bicycle Repair-Man"...