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Polyurethane on top of Polycrylic

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Forum topic by Stahl posted 12-22-2017 04:08 PM 458 views 0 times favorited 3 replies Add to Favorites Watch
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Stahl

16 posts in 684 days


12-22-2017 04:08 PM

Need help quickly. I made a box for a Christmas present and decided to try min wax polyclrylic to finish it, I am so not happy with the finish. Can I finish this project by spraying polyurethane over the water based polycrylic. Im still trying to learn all these different finishes and am giving myself a headache. Will the poly adhere to the water base?


3 replies so far

View TooTall17's profile

TooTall17

9 posts in 274 days


#1 posted 12-22-2017 04:27 PM

I’ve never done that, but it’s my understanding that as long as the polycrylic is 100% dry and cured you can go over it with the polyurethane. Probably wouldn’t be a bad idea to sand the box with some 220 grit before using the polyurethane.
What didn’t you like about the polycrylic finish? I’m just curious, I’ve always had good luck with that stuff.

View ArtMann's profile

ArtMann

1041 posts in 932 days


#2 posted 12-22-2017 08:40 PM

I am not so confident that you will get good adhesion with no additional prep. At the very least, you need to sand the item with 220 or 320 sandpaper to give the polyurethane something to grip. Others will advise you to spray with shellac first because it is a good material for transitions of the sort you want. I won’t recommend it because I haven’t personally tried it.

View John Smith's profile

John Smith

1308 posts in 279 days


#3 posted 12-22-2017 11:12 PM

if you google the question, the consensus comes back as
yes – if the polycrylic is over 4 days old and cured properly.
can you mask off a 2” area in a nonconspicuous area to try it ?

do you have some similar wood to practice on ?
call the customer service number on the can of PolyCrylic.
I know that Christmas is within hours and this may be a timing issue for everyone.

-- some people are like a Slinky - - - pretty much good for nothing. But still make you smile when you push them down a flight of stairs.

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