Return to the Woodworking Forum | Post a Follow-Up

 o
how to tell if it's water based or oil based polyurethane?

Posted by melissastar (My Page) on
Mon, Jun 4, 12 at 0:15

I'm finally able to start repairing and finishing the work my ROTSG (rotten, theiving sack of garbage) contractor left me with on my kitchen renovation and face a dilemma. Part of the kitchen has oak beadboard on the walls, but I know there is only one coat of polyurethane on it and I don't know if it's water based or oil based.

What I do know is that whatever is on there isn't much. There is very clear demarcation point where the stain is much darker on one side and much lighter on the other (apparently the stain was applied after the beadboard was installed on the lighter side and lying flat before being installed on the darker side.) This weekend, figuring I had nothing to lose, I went over the lighter part with the stain (horrible Minwax stuff) thinking it might "take" because the boards really don't feel like they've got much of anykind of sealer/poly on them. Sure enough, the stain took and dried just fine. It's a much better match now.

So question... I'd really rather an oil based polyurethane on the walls. Can I safely do that on top of whatever does happen to be there? Or do I need to find a way to figure out if the minimal that's there is water or oil and match it?
If the latter...how can I tell which it is?


Follow-Up Postings:

 o
RE: how to tell if it's water based or oil based polyurethane?

The only thing you need to do is scuff coat whatever is applied IF it is shiny.

If it is not shiny, go ahead and apply the oil based of your choice. You will need to apply at least three coats.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Woodworking Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here