Are you dealing with an akzo store now or a keystone store?
Their service has diminished over the years, and the final nail in the coffin was the buyout of their stores to LKQ/keystone. After that happened I would get calls for about a week asking if I needed anything (used to be a common thing when it was an akzo store).....I haven't spoken to anyone there in months now.
As far as the paint, the shop across the street used their WB for about a year and I can't say I heard of this. They used it all the way up to the beggining of this year. Their complaint was only that it was too slow for their style production. Must be something that has just started. I don't know anyone else around here that uses their water.