Twenty four hours after spraying the G2 it has hardened well for sanding. I rough-blocked it with 80 grit to break the polyester 'glaze' and knock off the worst of the orange peel. That was followed with a misted spray-on black guide coat. This will next all get knocked down with 180 grit to prepare for a couple coats of urethane surfacing primer. In the process, most of that 1-gallon of polyester primer will end up being sanded off, remaining only in the formerly low spots.
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