Results 1 to 5 of 5

Thread: The right paint over epoxy

  1. #1
    Join Date
    Apr 2012
    Location
    NW Ohio
    Posts
    54

    Default The right paint over epoxy

    In my previous boatbuilding in the US I used oil-based Rustoleum marine paint directly over two coats of epoxy, with good results. Now I'm building my third boat here in Greece, the epoxy supplier tried to talk me into using a special primer (polyurethane I think) and epoxy paint. Is there any reason to listen to them? I'm not sure I can find marine grade oil paint but there are plenty of good exterior ones. The boat will not be spending much time in the water between outings.

  2. #2
    Join Date
    Dec 2003
    Location
    Portland, Oregon
    Posts
    50,259

    Default Re: The right paint over epoxy

    No - don't listen to them. Unless they have some sort of proprietary knowledge about the epoxy that makes it atypical. Epoxy itself is an excellent primer. Just let it cure well, scuff it lightly, and paint. I've painted over epoxy with water-based paints (enamels of various gloss), oil-based paints (porch & deck paints, single-pot polyurethanes, etc.), and catalyzed paints (2-pot polyurethanes from Interlux, Epiphanes, Sherwin-Williams, Miller, PPG, Dupont, and more). Zero problems to date.
    David G
    Harbor Woodworks
    https://www.facebook.com/HarborWoodworks/

    "It was a Sunday morning and Goddard gave thanks that there were still places where one could worship in temples not made by human hands." -- L. F. Herreshoff (The Compleat Cruiser)

  3. #3
    Join Date
    Nov 2004
    Location
    Port Townsend WA
    Posts
    11,819

    Default Re: The right paint over epoxy

    I agree with David and I will add that the epoxy surface must be well sanded in order to create a mechanical bond since there is no wood grain for the paint to soak into for bonding.
    jay

  4. #4
    Join Date
    Oct 2009
    Location
    South Puget Sound/summer Eastern carib./winter
    Posts
    15,287

    Default Re: The right paint over epoxy

    I like to use an epoxy primer/under coated (interlux 404/414). It goes on like paint. It sands easier than straight epoxy. It has no blush. It is not nessesary, but makes a better job, especially if your final coat is trying to be a fine yacht finish.

  5. #5
    Join Date
    Mar 2001
    Location
    FL
    Posts
    217

    Default Re: The right paint over epoxy

    Petit Skip Sand worked for me on epoxy...it leaves a tacky surface for the paint to grab. I epoxy resin coated a 30' wood hull and used the skip sand for prep under International oil base. No blush prep was required with this stuff.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •