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Proper application of polyurethane - Need help

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  • #16
    Re: Proper application of polyurethane - Need help

    Just in case...
    Be aware that most clear epoxy will degrade very rapidly when exposed to UV light. It will discolor in less than a few months and deteriorates quickly after that.
    Some marine products have stabilizers added to combat this, but pigmented epoxy (eg: paint) with stabilizers has the best UV resistance.


    Originally posted by davepellegrene View Post
    I have been doing a lot of projects using epoxy. I now you can spray it with the right equipment. I just used an epoxy with a 90 minute set time. I used it to fill in between pieces of granite. It seemed to flow out really nice. Made me think you could probably roll it onto a project and it would have time to flow out smooth. You can also add color to it. I am getting ready to put a new surface on my water ski jump. I will be using sheets of cdx plywood coated on all sides and edges with an epoxy prime then probably two coats of epoxy. This will be a good place to see how it flows with a roller.
    ~99%
    Make me an angel that flies from Montgomery
    Make me a poster of an old rodeo
    Just give me one thing that I can hold on to
    To believe in this livin' is just a hard way to go

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    • #17
      Re: Proper application of polyurethane - Need help

      I use a very short nap synthetic roller cover.
      Useing a slow set hardener is a good thing.
      Heat accelerates the curing process exponentially.

      Originally posted by jerryanderson View Post
      I assume this would be some kind of sponge or foam rubber roller?? Would one like a small decorative roller be used for small projects? I will pursue this further when the weather gets a little warmer around here!
      ~99%
      Make me an angel that flies from Montgomery
      Make me a poster of an old rodeo
      Just give me one thing that I can hold on to
      To believe in this livin' is just a hard way to go

      Comment


      • #18
        Re: Proper application of polyurethane - Need help

        Originally posted by bobbarkto View Post
        Just in case...
        Be aware that most clear epoxy will degrade very rapidly when exposed to UV light. It will discolor in less than a few months and deteriorates quickly after that.
        Some marine products have stabilizers added to combat this, but pigmented epoxy (eg: paint) with stabilizers has the best UV resistance.
        Thats good to know especially with the jump surface. It is suppose to have a contrasting color to the water, like red, so pigmented is a good idea.
        http://www.pellegreneacoustics.com/

        Trench Seam Method for MDF
        https://picasaweb.google.com/101632266659473725850

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        • #19
          Re: Proper application of polyurethane - Need help

          Originally posted by jerryanderson View Post
          I assume this would be some kind of sponge or foam rubber roller?? Would one like a small decorative roller be used for small projects? I will pursue this further when the weather gets a little warmer around here!
          http://www.boatbuilding.net/article....6/04/04/120201

          Here is an article I was reading when I was researching for my jump surface. It has a lot of good tips in it. I like the part to heat stuff up. I had issues with varnish as I was spraying it on some cabinets I built. It was cold and I heated the shop up and sprayed with cold varnish and cold surface and the finish looked like it had goose bumps. I had just red this article and heated up the varnish and put the cabinet in front of the heater. Sanded it back down and resprayed it. It came out really nice!
          I have been heating my stuff up since and the finish seems to flow much better.
          I just built a sub Thursday and sprayed it with auto finish using the heating method. So far as its drying it looks good.
          http://www.pellegreneacoustics.com/

          Trench Seam Method for MDF
          https://picasaweb.google.com/101632266659473725850

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