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Abrasives to Reduce Sheen Incrementally on Gloss Polyurethane?

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Forum topic by Lovegasoline posted 05-17-2021 08:39 PM 918 views 0 times favorited 27 replies Add to Favorites Watch
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Lovegasoline

195 posts in 1157 days


05-17-2021 08:39 PM

Doing a floor repair and have scraped, sanded, color matched, and topcoat with x2 coats of Semi Gloss Poly (solvent base poly … a gallon of old stuff someone left and may have used on the floors, very viscous). Sheen was a little too low and didn’t match. Got a quart of Gloss Minwax Poly and laid down coat … but it’s too glossy.

I want to just hit it with an abrasive – carefully – to knock down the sheen incrementally so I can sneak up on a perfect match. I think 0000 steel wool may lower the sheen too much. Any ideas on some stuff I my have laying around that would work? Been dry for about 20 hrs. and I want to get this completed ASAP.

Below are some pics of the various stages of the repair; the last three show the current state of the finish in raking light to clarify what the sheen is like.

Thanks for any ideas.

-- “It is the beginning of wisdom to recognize that most men are fools and knaves, but it is the end of wisdom to embrace that vision.” -Arthur Kleps


27 replies so far

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SMP

4153 posts in 1024 days


#1 posted 05-17-2021 08:44 PM

Can try the ultrafine 3m pads called “gold” but kind of look more silver/grey to me. Then just use a floor wax that will even it all out.

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ibewjon

2480 posts in 3912 days


#2 posted 05-17-2021 08:45 PM

You probably don’t have pumice stone or rottenstone around, but they are very fine abrasive. I would wait a week. Dry to the touch is not cured. Maybe some comet type cleanser, finer than steel wool. Or very fine wet or dry sandpaper, 1000 grit or finer.

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Lovegasoline

195 posts in 1157 days


#3 posted 05-17-2021 08:55 PM


You probably don t have pumice stone or rottenstone around, but they are very fine abrasive. I would wait a week. Dry to the touch is not cured. Maybe some comet type cleanser, finer than steel wool. Or very fine wet or dry sandpaper, 1000 grit or finer.

- ibewjon

I think I have some rottenstone around.
Use it dry? Or with lube? What kind? What backer pad?
Unfortunately I don’t have a week to wait … it has to be blended in and the tape has to come off.

-- “It is the beginning of wisdom to recognize that most men are fools and knaves, but it is the end of wisdom to embrace that vision.” -Arthur Kleps

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Lovegasoline

195 posts in 1157 days


#4 posted 05-17-2021 08:58 PM



Can try the ultrafine 3m pads called “gold” but kind of look more silver/grey to me. Then just use a floor wax that will even it all out.

- SMP

The floor is poly so I don’t see the point of putting a layer of wax over it … and it will only contaminate things for any future work.
I don’t have any of those Ultrafine pads you mention.

-- “It is the beginning of wisdom to recognize that most men are fools and knaves, but it is the end of wisdom to embrace that vision.” -Arthur Kleps

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ibewjon

2480 posts in 3912 days


#5 posted 05-17-2021 09:03 PM

I bought the rottenstone with a felt block and a bottle of lube. I am sure there are articles on line if not here. Dry might be ok, just a tiny bit on a soft rag.

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Lovegasoline

195 posts in 1157 days


#6 posted 05-17-2021 09:44 PM

I’ve got these products on hand:

PS: any idea why this software is rotating my images against my will?

-- “It is the beginning of wisdom to recognize that most men are fools and knaves, but it is the end of wisdom to embrace that vision.” -Arthur Kleps

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ibewjon

2480 posts in 3912 days


#7 posted 05-17-2021 11:34 PM

I don’t know on the rotation. It is the only site that does that u visit. You have all grits, the lube and felt block. All set to shine. Or un shine!

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Lovegasoline

195 posts in 1157 days


#8 posted 05-17-2021 11:37 PM


I don t know on the rotation. It is the only site that does that u visit. You have all grits, the lube and felt block. All set to shine. Or un shine!

- ibewjon

Ok … but which one(s) shines and which one(s) unshines?
Where to start to incrementally knock down the sheen?

-- “It is the beginning of wisdom to recognize that most men are fools and knaves, but it is the end of wisdom to embrace that vision.” -Arthur Kleps

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ibewjon

2480 posts in 3912 days


#9 posted 05-18-2021 03:25 AM

If looking for gloss, work from coarse to fine. If removing gloss, start fine and go coarser if still too much gloss.

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Redoak49

5274 posts in 3107 days


#10 posted 05-18-2021 10:53 AM

I would try a brown paper bag.

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gdaveg

202 posts in 321 days


#11 posted 05-18-2021 11:42 AM

PS: any idea why this software is rotating my images against my will?

You can eliminate the rotation by reducing the size just slightly. maybe 2% or less. Don’t know why this fixes it. Little Black Duck (think it is him) has a post where he suggests this solution to rotation.

you could go to a sherwin Williams paint store or Woodcraft and get the blue Norton foam abrasive pads. they are available is several fine grits 500-600 / 800-1000/1200-1500 are the three I keep on hand.

-- Dave, Vancouver, WA & Tucson, AZ

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gdaveg

202 posts in 321 days


#12 posted 05-18-2021 11:46 AM

Yes it was LBD. Here is the link
.
https://www.lumberjocks.com/LittleBlackDuck/blog/129914

-- Dave, Vancouver, WA & Tucson, AZ

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Lazyman

7135 posts in 2506 days


#13 posted 05-18-2021 11:55 AM

I would try the white 3M abrasive pads. I think that they are supposed to be equivalent to 0000 steel wool but I find them are much gentler so easier to sneak up on the sheen level you want. I usually use a paste wax to sort of lubricate it as I use it but it is not necessary and you can always remove the wax with some mineral spirits afterwards.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

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Sark

414 posts in 1479 days


#14 posted 05-18-2021 12:45 PM

I would use fine foam backed sanding pads, such as Abralon which are available in 500 to 4,000 grit. I don’t like using pumice/rotten stone in open grained woods such as oak because it is hard to get the wood pores clean after filling with abrasive powders and oil. The pads are readily available on Amazon and other retailers.

Similar foam-backed sanding pads are also sold in auto supply stores, paint stores, woodworking stores. Grits from coarse to 12,000. Pumice/rotten stone/steel wool are the power fine-abrasive systems from bygone centuries. The modern stuff is easier to use and gives you more control. Go finer grit for more shine, coarser grit for less gloss. Can be done by hand or with a RAS. Can use water as a lubricant or used dry.

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darthford

738 posts in 3043 days


#15 posted 05-18-2021 01:25 PM

StewMac sells foam core sanding pads through 12,000 for this when doing repairs on guitars. I used them to match some poly after stripping the fretboard during a refret, refinishing then blending to match the poly on the back/side of the neck.

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