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Pro tip: a painter with 30 years in told me to stop blocking primer with 180 and my sandpaper bill dropped $60 a car
He said it at his retirement lunch in Fresno and I thought he was just old school, but three jobs later the trash can full of loaded paper doesn't lie. Anyone else still hitting primer with 180 out of habit?
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grayjohnson12d ago
Nobody talks about how primer grit choice changes what your topcoat does later either. I switched to 320 on epoxy primer and my base coat laid down flatter with less orange peel, which meant I could spray one less coat of clear on some jobs. That savings adds up way past sandpaper money. The old guy was right but for a different reason than he probably knew. Primer scratches telegraph right up through everything you put on top of them.
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