Wings On?
Good to hear you are attempting to contact John.
I had my 9A flying for a couple of years - unpainted. When I came to a point where I was ready for paint, several painters refused to paint it unless the wings were off. They would not work "upside down" under the plane.
John had no problem with doing that. With a good creeper and (no problem with a 9A) a bit of height, he could do a good job on the bottom of the wing - still attached.
HOWEVER, if you are at a point where you want to add paint, and have not mounted the wings "permanently" it will be a very easy task to trailer / truck your bird down to John's shop and let him have complete access to it so he can get it done with minimal interruptions.
I took as much off the plane as possible, took them down to John, the rest of the bird (fuselage and wings) were left in my hangar at S12 (Albany, OR). That required John to make a few trips up I5 to get that work done. Needless to say, he would have preferred doing all the work in his shop, but did the job as my situation required.
John's shop is NOT at the Eugene (KEUG) airport as there are too many DEQ restrictions to get a paint shop established there. You'll have to work with him based on your specific needs / situation.