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Grain filler OVER polyurethane?

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Forum topic by lateralus819 posted 08-07-2013 01:25 AM 2803 views 0 times favorited 8 replies Add to Favorites Watch
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lateralus819

2236 posts in 1350 days


08-07-2013 01:25 AM

I’ve got a few coats of poly on my table top (sapele). I sanded it back and some pores are still visible. Is there a fill that can be applied over the poly? It’s oil based wipe on.


8 replies so far

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shampeon

1711 posts in 1644 days


#1 posted 08-07-2013 01:50 AM

It’s common in luthier circles to grain fill a contrasting color after sealing, so I’d say you’re probably fine as long as the poly has cured.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

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kdc68

2526 posts in 1738 days


#2 posted 08-07-2013 02:31 AM

lateralus has a great question….shampeon what would you recommend for a filler that can be applied over poly?

-- Measure "at least" twice and cut once

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shampeon

1711 posts in 1644 days


#3 posted 08-07-2013 03:00 AM

In this case, I think an oil-based filler would be more appropriate. I’ve used Timbermate and Target Coatings fillers, and those are water-based.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

View 404 - Not Found's profile

404 - Not Found

2544 posts in 2430 days


#4 posted 08-07-2013 09:05 AM

Pour on some poly, spread it out and into the pores with something flat, wait to dry, cut it all back flat with p180, add more coats of poly as required.

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lateralus819

2236 posts in 1350 days


#5 posted 08-07-2013 09:52 AM

Ah renners, are you talking about basically using a squeegee of sorts to impact it into the pores?

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rrww

263 posts in 1574 days


#6 posted 08-07-2013 12:37 PM

Thats what I do- work it with a squeegee & sand back and do it again if it needs it. I like general finishes arm-r seal. Then I topcoat.

Good luck

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404 - Not Found

2544 posts in 2430 days


#7 posted 08-07-2013 12:53 PM

That’s right, I keep my old planer knives for doing this, or a plastic spreader. This works for me but I urge you to try it on a test piece first, and don’t allow any drips to form on the edges (wipe away with a ms wet rag).

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mahdee

3548 posts in 1228 days


#8 posted 08-07-2013 01:02 PM

Poly is a pain if you want a descent looking finish. Rub on is ok for the final touch but to start with, use brush on. Give it a thick coat and depending on humidity, wait 3-4 hours and sand with 220G. Then give it another coat and sand after a day or so; then another and another if necessary. I wouldn’t put anything but poly over poly. Good luck

-- earthartandfoods.com

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