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top coat for boiled linseed oil

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Forum topic by ROB_IN_MN posted 03-04-2013 07:43 AM 1808 views 0 times favorited 5 replies Add to Favorites Watch
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ROB_IN_MN

20 posts in 891 days


03-04-2013 07:43 AM

Topic tags/keywords: question

I am trying to determine how long I should wait before topcoat a walnut/maple end table I made. I cut the BLO 1 part to 2 parts of mineral spirits and then wiped it off after a few minutes.

on the can, it says I can topcoat with poly. I’ve read on various forums that this is a bad idea. Should I topcoat with something?

Also, how long should I wait until I put a top coat on the end table?


5 replies so far

View Fred Hargis's profile

Fred Hargis

2032 posts in 1238 days


#1 posted 03-04-2013 12:45 PM

With the exception of shellac, the BLO should be cured before top coating…and that may take a day or two. After that most any oil based finish will adhere to it (including the polyurethane formulas). If it’s a water borne urethane, then wait 5-7 days. You can get around all of this if you put a barrier coat of dewaxed shellac (for Zinnser, this would be Seal-Coat). on the blo first. The shellac can be applied very soon after the blo sits, wit in a day or so.

-- Our village hasn't lost it's idiot, he was elected to congress.

View dhazelton's profile

dhazelton

1264 posts in 1041 days


#2 posted 03-04-2013 01:51 PM

You could do more coats of oil and finish with a good paste wax as well.

View CharlieM1958's profile

CharlieM1958

15780 posts in 2963 days


#3 posted 03-04-2013 02:58 PM

There is absolutely no problem putting oil based poly over BLO. ( I doubt there is a problem with water-based poly either, but I won’t comment because I haven’t cone it). As far as waiting time, I would let the BLO dry for a couple of days just to be on the safe side. If it feels dry to the touch you should be fine.

If this were a strictly decorative piece, I would recommend you just finish with wax. But since BLO and wax doesn’t give you very much protection for something like an end table, I think the poly top coat is a good idea.

-- Charlie M. "Woodworking - patience = firewood"

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ROB_IN_MN

20 posts in 891 days


#4 posted 03-04-2013 03:04 PM

I ended up waiting a couple hours until after it already was dry to the touch, so I figured…what the heck. Seems to have worked fine.

thanks for the advice.

View John's profile

John

184 posts in 2328 days


#5 posted 03-04-2013 03:59 PM

I use PolyAcrylic over BLO all the time. I wait a few days to a week. I like to wait a week just to be sure.

-- John, Long Island, NY

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