I've used Zinsser BIN to paint beams and ceilings. Goes straight into the spraygun and goes on lovely. It's not great on a brush, but it's not for that.
There's a new acrylic version that's a great replacement for a shellac based version like BIN.
@Airhead started
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I've used Zinsser BIN to paint beams and ceilings. Goes straight into the spraygun and goes on lovely. It's not great on a brush, but it's not for that.