Spar urethane question

wcoastwhacker · Aug 8, 2011

When coating plywood with spar urethane, do you coat every single side or do you leave the bottom un coated?

Also, how many coats should I put on?

MDFisherman57 · Aug 8, 2011

I placed it on both and mainly it took about 2 coats. Some took 3 coats it just depended on how well it absorbed the spar urethane. You kinda want a glossy finished look to it then you know its coated well.

jigngrub · Aug 8, 2011

Paint both sides and all of the edges.

I believe the directions say to use 3 coats for surfaces exposed to moisture and/or the elements. Be sure to let each coat dry completely before applying the next coat.

lckstckn2smknbrls · Aug 8, 2011

Can you paint over it?

wcoastwhacker · Aug 8, 2011

Also, do you need to sand the plywood before applying or Sand between coats ? Or both ?

jigngrub · Aug 9, 2011

No need to sand for the first coat, but I do give it a light sanding with 150 grit in between coats.

reedjj · Aug 9, 2011

I used the Helmsman Spar from Minwax in the spray can and put it on all sides, paying special attention to the edges and anywhere I made a cut or a screw hole.

I did 3 coats.

reedjj · Aug 9, 2011

yes you can paint over it. I explain how it did mine a little more in depth here.

https://www.tinboats.net/forum/viewtopic.php?f=21&t=17299&hilit=swamp+sled

Spar urethane question

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