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Is spar varnish okay to put on top of quick drying polyurethane?

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Forum topic by Canofworms posted 08-10-2014 01:55 PM 662 views 0 times favorited 8 replies Add to Favorites Watch
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Canofworms

93 posts in 253 days


08-10-2014 01:55 PM

I’m finishing a hope slab and a butcher block from IKEA and I’m not happy with the drying polyurethane finish.
I want something with meat to it so I can actually see the finish.
I did a butcher block years ago with a code so spar varnish and I really liked it.
I can Sandown the Bairwood again but I’d rather not if I don’t have to because I filled in stain the knots and I’m happy with the results.
Can I just headed up with 220 to scuff it and then put those eight coats of spar varnish on that I want?


8 replies so far

View firefighterontheside's profile

firefighterontheside

5875 posts in 607 days


#1 posted 08-10-2014 02:02 PM

How many Coats of poly have you done? If you’re wanting thickness of finish, you can put many coats of poly on. The coats of poly will dry much faster with subsequent coats. If you really want a thick finish, I would use a pour on finish that you can get at lowes. I’ve not used it, but know those who have.

-- Bill M. I love my job as a firefighter, but nothing gives me the satisfaction of running my hand over a project that I have built and just finished sanding.

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Canofworms

93 posts in 253 days


#2 posted 08-10-2014 05:49 PM

Thanks. I’m really just want to know of the spar varnish can go over poly.

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firefighterontheside

5875 posts in 607 days


#3 posted 08-10-2014 11:17 PM

I just read a comment by the wood whisperer if you’re familiar and he said that regular polyurethane and spar urethane are compatible, just have different intended uses. Spar being intended for outdoor use because it has a higher solid content, which may be the reason you get a finish you can see. He advised to use 220 and then put the spar over the top. Didn’t mean to say your plan was wrong.

-- Bill M. I love my job as a firefighter, but nothing gives me the satisfaction of running my hand over a project that I have built and just finished sanding.

View gfadvm's profile

gfadvm

11534 posts in 1440 days


#4 posted 08-11-2014 12:17 AM

Yep, no problem putting Spar Urethane over Poly or vice versa. Just scuff sand with some 220 and go for it. I have wiped and sprayed Spar over poly with no problems.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

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AlaskaGuy

823 posts in 1059 days


#5 posted 08-11-2014 01:19 AM

Yes you can do that but the spar varnish will be a softer finish.

-- Alaskan's for Global warming!

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Canofworms

93 posts in 253 days


#6 posted 08-11-2014 03:53 PM

Softer yes, but I am thinking more durable as it will dent and ding rather that chip. It will be easier to spot fix and after 7 or 8 coats it will be thick enough to see.
Which is what I want.
I want to sit at the breakfast bar and be able to see the depth.
After my last coat I will sand with a 400 or 800 grit and then buff it with butchers wax.

I know this is more work than needed, but this is what I want.

View LarryT's profile

LarryT

14 posts in 827 days


#7 posted 08-11-2014 04:00 PM

Sounds as if you know how spar varnish reacts. My experience with using it on surfaces that will be
handled frequently is that it always has almost a “sticky” feel expecially during our humid midwest summer
weather. I have decided never to use it indoors again.

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Canofworms

93 posts in 253 days


#8 posted 08-11-2014 04:04 PM

I like the waxed finish, the way it feels. I must admit I also like telling people that its a waxed finish

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