Pat,
You are close enough to EQ to talk to Les on the bottom paint. They are pros at this -- a State certified system -- and Les or Karl would be happy to give you advise.
I've had several boats painted there over the years, and all have done well WITH NO BLISTERS. Until they get more worker bees they won't be doing any bottom painting!! They sand the bottom thoroughly before applying paint -- and I'll guarantee you that it ain't no job for the faint of heart -- and virtually impossible on a trailer. BTDT!
The last time I checked, the factory does use a barrier coat -- if I were faced with bottom painting and not Air Doc, I'd be negotiating with the factory to have them do the job. I said it before, but dude, this is one labor-intensive task.
I've gone to the Air Doc, and you are sure welcome to come down to Cornet Bay and take a look. Son-in-law Larry uses the Air Doc and seems quite pleased. Mine is still a virgin cuz the boat is not quite read for its first bath, but soon -- I hope soon.
Dusty -- who has spent many unpleasant days sanding and preparing boat bottoms for paint.