how smooth to power sand before painting


Old 02-15-04, 12:31 AM
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how smooth to power sand before painting

Hi folks,

I've been heat stripping and power sanding (both a random orbit sander and a 3D sander) my wood stair railings. My question is...

What should my final grit be on the sandpaper for the power sanders before I prime? I was about to go very fine (400 grit), but then I was wondering if you can actually make it TOO smooth for the primer and paint to stick.

Forgive me if this is a stupid question; I'm new at this.

I'd like the railings to be as smooth as possible after primering and painting, but I don't want to have to re-do it in a couple years.

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Old 02-15-04, 06:20 AM
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No, you can't make it too smooth for the paint to stick. I've painted glass, metal, and finished plaster is very smooth.

Make sure to use a tack cloth on it after sanding to pick up the dust and crumbs before painting.

And also lightly sand and tack cloth between each coat applied.
Old 02-15-04, 09:50 AM
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That's exactly the answer I was looking for. Thanks!
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