chalking with polyurethane

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  • tellittojake
    Forum Newbie
    • Apr 2006
    • 50
    • toledo, ohio
    • Ryobi BT3100

    #1

    chalking with polyurethane

    My father in law said that when he uses polyurethane, he sometimes gets what he referred to as chalking. I am not sure what he meant and could not offer a solution. Does anyone know what he is referring too? What is the reason for it? I told him I would post the question to try to get an answer. Any ideas out there? thanks.
  • Pappy
    The Full Monte
    • Dec 2002
    • 10481
    • San Marcos, TX, USA.
    • BT3000 (x2)

    #2
    Chalking is usually refering to a powdery surface that rubs off on old paint. Never seen it on polys, though.
    Don, aka Pappy,

    Wise men talk because they have something to say,
    Fools because they have to say something.
    Plato

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    • eddy merckx
      Established Member
      • Mar 2006
      • 359
      • Western WA
      • Shop Fox Cabinet

      #3
      Wonder if he's thinning it with too much water. Even though it's water based, you're not supposed to thin with much more than 5% water before you risk messing up the chemical balance.

      Also wonder if he's straining the solid chunks out before applying.

      Eddy

      Comment

      • tellittojake
        Forum Newbie
        • Apr 2006
        • 50
        • toledo, ohio
        • Ryobi BT3100

        #4
        poly

        I will ask if he is using water based, didnt think of that. I too have never heard of chalking in reference to poly. Thanks

        Comment

        • Jeffrey Schronce
          Veteran Member
          • Nov 2005
          • 3822
          • York, PA, USA.
          • 22124

          #5
          I just about guarantee that he is using old oil based poly. Bet $10 it has been sitting on the shelf for quite a while and has made it through a few weather cycles. I have immense knowledge in this department! You can only guess how I know this! LOL!

          Let me know if I am right.

          Comment

          • tellittojake
            Forum Newbie
            • Apr 2006
            • 50
            • toledo, ohio
            • Ryobi BT3100

            #6
            old poly

            He does not do the amount of woodworking projects that I do and I wouldnt be surprised at all if it is old. I will have to ask him. thanks

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