Interesting discussion...I'm also retired. When I do get to sit at my work table its after lunch for a couple or 3 hours. Could be 1-2 days a week or more. As will a lot of us, airbrushing is dependent on the weather. Mine is done in my garage and when I do get to, it usually only happens 2 days a week and again after lunch.
FWIW, that's my 2 cents?