final grit for oil+urethane topcoat

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Forum topic by DTrak posted 01-01-2016 03:15 PM 381 views 1 time favorited 3 replies Add to Favorites Watch
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39 posts in 518 days

01-01-2016 03:15 PM

I was about to apply my arm-r-seal oil&urethane satin finish when I read the directions and noticed that it said I should finish with no finer than 220grit sandpaper. I used 320 grit because I like how silky it is. Is that ok, or do I need to redo it with 220?

3 replies so far

View jerryminer's profile


497 posts in 862 days

#1 posted 01-01-2016 06:10 PM

If you’re clear-coating only (no stain) you’re fine, although you may have spent more effort sanding than needed.

If you are staining, you don’t want to sand too fine as it prevents the pigment from lodging in the wood and providing color (results in a lighter color than coarser paper)

View WoodNSawdust's profile


1417 posts in 597 days

#2 posted 01-01-2016 06:17 PM

Jerry gave you good advice.

The rule I was taught is for oil based sand through 220, for water based sand to 320. Sand to the next grit on end grain to prevent it from darkening when the finish is applied.

-- "I love it when a plan comes together" John "Hannibal" Smith

View DTrak's profile


39 posts in 518 days

#3 posted 01-01-2016 08:31 PM

that makes sense. Thank you both for the feedback

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