I'm pulling my hair out!

Discussion in 'Boatbuilding' started by tommyboy, Jan 25, 2010.

  1. tommyboy
    Joined: Jan 2010
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: boston

    tommyboy New Member

    I'm trying to get rid of some of the fogged look thats in my clear coat. I've tried sanding and then waxing, penetrol......and nothing seems to work. Well the penetrol looks good for a few days then its back to normal. Anyone have a solution? Someone mentioned sanding with 1500 paper then spraying gel coat over it. Any help????:(
     
  2. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 476, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Cut the surface until smooth and free of oxidized gel coat, then polish to satisfaction or until you plow through the gel coat, which ever comes first. Hopefully it'll shine before you see mat.
     
  3. alan white
    Joined: Mar 2007
    Posts: 3,731
    Likes: 121, Points: 0, Legacy Rep: 1404
    Location: maine

    alan white Senior Member

    A common mistake is to sand with too fine a paper. 80 grit is a good place to start with a well oxidized gel coat. Then thru the grits--- the closer the numbers the better and don't skip. I do it by hand and it takes a good 10 minutes per square foot, and I do a 6 sq ft section in an hour.
    The outer surface, if looked at under a microscope, is porous, like swiss cheese. The idea is to get down below that porous layer, or as deep as you can without going so deep that you go right through the gel coat.
    As PAR said, cut the surface (by sanding as described). Take one small representative section and see what happens. If you're up against painting you have nothing to lose.
    I've had good luck with boats I've resurfaced. Gel coat is usually a lot thicker than you think, and even 80 grit, if used evenly, can be effectively leave most of the original gel coat intact.
    Stay away from power sanders unless you know how to control them, although they are a big time saver. I use a random orbit sander until I get to wet sanding paper at about 320 grit.
    Then I wet sand to 1000 grit and buff with rubbing compound, and follow by machine polishing.
     

  4. Commuter Boats
    Joined: Oct 2006
    Posts: 177
    Likes: 12, Points: 18, Legacy Rep: 182
    Location: Southeast Alaska

    Commuter Boats Commuter Boats

    I'm not sure that I understand what your material is and any response would be specific to that material, paint, gelcoat, whatever
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.