When I did a classic wooden yacht topsides in the boatyard, I'd spray the sanding undercoat because it was easier to cover any underlying dark spots by working "round and round." I could spray another shot by the time I'd come around to the dark spot again and it would be dry enough to shoot a bit again, then I'd sand and tack and I'd always do multiple thin gloss finish coats with a brush. (None of that "roll and tip" thin coat crap for the pros!) The best part of the job was afterwards telling the "rubberneckers,' "No, it's not a fiberglass hull." Those jobs would hold up for years and never blister or peel. (Full disclosure: they were well-maintained tight high-quality planking under all my paint.)
