Just got done shooting the first coat of PPG DZ-3 primer surfacer. The DZ-3 is a high build primer that is a great scratch & pin hole chaser. I did find a couple spots that will need a dab of filler then 90% of the DZ-3 gets sanded off. Fortunately it is designed for this purpose & sands easily and comes off like baby powder. Down side is it makes the same kind of mess so the floor will get a real good sweeping after sanding the hull.
