Gel Coat Finish

Discussion in 'Fiberglass and Composite Boat Building' started by Tim McCraney, May 13, 2024.

  1. Tim McCraney
    Joined: May 2024
    Posts: 4
    Likes: 0, Points: 1
    Location: Florida

    Tim McCraney New Member

    Hello- How do you get this type gel coat finish - I have a spray gun w/ 2.5 tip ? Any advice would be greatly appreciated-
     

    Attached Files:

  2. Blueknarr
    Joined: Aug 2017
    Posts: 1,469
    Likes: 424, Points: 83
    Location: Colorado

    Blueknarr Senior Member

    Welcome to the forum.

    You are trying to achieve an extreme orange peel finish.

    Lower your fan air pressure.
    Narrow your fan
    Use thicker gelcoat than normal
    Use a minute amount of webbing solution in the gelcoat

    Do lots of test samples with notes of air settings and mix ratios.

    Good luck
     
    Howlandwoodworks and ondarvr like this.
  3. Tim McCraney
    Joined: May 2024
    Posts: 4
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    Location: Florida

    Tim McCraney New Member

    Thank you sir
     
  4. ondarvr
    Joined: Dec 2005
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    Location: Monroe WA

    ondarvr Senior Member

    As mentioned, you need to experiment a bit. You can slightly thicken the gel coat with silica if it's too thin.
     
  5. Tim McCraney
    Joined: May 2024
    Posts: 4
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    Location: Florida

    Tim McCraney New Member

    Thanks guys
     
  6. Howlandwoodworks
    Joined: Sep 2018
    Posts: 239
    Likes: 89, Points: 38
    Location: USA MO

    Howlandwoodworks Member

    You might want to look into using a viscosity cup.
    It is a simple gravity device that permits the timed flow of a known volume of liquid passing through an orifice.

    [​IMG]
    Check for manufacturer recommendation for the size of tip to viscosity of gel coat finish and the thickness of wet coats. Then keep a log of the viscosity, thickness, temp, humid etc...
    upload_2024-5-14_17-25-27.png
    Here is a Similar Threads on gel coat finish.
    more gelcoat spraying-specific to gun/setup https://www.boatdesign.net/threads/more-gelcoat-spraying-specific-to-gun-setup.66329/
     
  7. Tim McCraney
    Joined: May 2024
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    Location: Florida

    Tim McCraney New Member

    Thank you for the info.
     
  8. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Also use a really large tip and a gravity fed spraygun.
     

  9. Blueknarr
    Joined: Aug 2017
    Posts: 1,469
    Likes: 424, Points: 83
    Location: Colorado

    Blueknarr Senior Member

    I have used this device for small (1sq ft )
    Replace the plaster with gelcoat
     

    Attached Files:

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