Polyester Resin / Marine Varnish newbie question

Discussion in 'Fiberglass and Composite Boat Building' started by Greg Vasquez, Sep 3, 2017.

  1. Greg Vasquez
    Joined: Sep 2017
    Posts: 1
    Likes: 0, Points: 0
    Location: Texas

    Greg Vasquez New Member

    Howdy,
    I recently applied polyester resin and cloth but ran out of resin so what is on is only unwaxed resin that I intended to layer more. I was waiting 3 hours between coats but now I'm stuck in a rural area near no suppliers and it's been 1/2 a day now. Can I use a Marine Spar Varnish at this point to help cure the unwaxed resin? I was originally told I had to apply the waxed resin final coat, then sand and varnish. Thanks for your Help

    Greg
     
  2. Blueknarr
    Joined: Aug 2017
    Posts: 1,206
    Likes: 273, Points: 83
    Location: Colorado

    Blueknarr Senior Member

    Greg

    Are more layers of cloth/ resin going to be applied?
    It is unadvisable to trap varnish within the laminate stack,
    Most formulations of varnish won't properly adhere to fresh resin and never to wax.
    I never add wax to any resin, it will cure without it,
    I advise covering with heavy plastic sheeting. When you are ready to continue, sand thourally with coarse grit. Use peal-ply with final layer of resinated cloth. When it cures simply pull the peal-ply off and varnish to your heart's content.

    Paul
     
  3. gonzo
    Joined: Aug 2002
    Posts: 15,408
    Likes: 1,000, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    There is nothing wrong with leaving the surface sticky. The next lamination will bond to it. If you want, a light wipe with acetone or styrene will clean the surface before laying on the next.
     
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