Get hull surface even?

Discussion in 'Fiberglass and Composite Boat Building' started by andysailor, Nov 10, 2017.

  1. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    1708 is lightly stitched with common thread (polyester I think). With the mat down, which is correct for good inter-laminate bonds, you should lightly kiss the surface with a DA or orbital sander, which will remove most of the threads and flatten the surface. It'll still have undulations, but it will be much better. If it's still got a lot of divots, a light skim coat of fairing compound, before a finishing cloth will do. Conversely you can use mat, which is wasteful of resin and heavy, but effective in a non-weight sensitive area, especially high traffic locations.
     
  2. midcap
    Joined: Oct 2013
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    Location: United States

    midcap Junior Member

    Thank you very much for the help!
     

  3. ondarvr
    Joined: Dec 2005
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    Location: Monroe WA

    ondarvr Senior Member

    As PAR said, CSM can be used on the surface if weight isn't much of an issue. The CSM also helps because it creates a durable protective layer to prevent the structural fibers from being compromised by being sanded through, and this happens all too frequently when trying to get the surface looking good.
     
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