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Thread: gel peeler

  1. #1
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    Default gel peeler

    Hi everyone- just acquired a 27' Alan Buchanan designed cold moulded ply boat which has grotty epoxy sheathing. Any reason which I should not use a new blade on an electric planer on finest setting to get this off before re-epoxying? Surely that is what a gel peeler is?

  2. #2
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    Default Re: gel peeler

    define grotty
    Is the epoxy coming off? Is it wet underneath? Does it have an actual cloth sheathing? Can it be ground without gumming up the abrasive?
    Is it just the anti foul that has built up too thick?

    Unless it NEEDS to be removed, I would think s proper sanding would be in order. That means SHARP sandpaper. Dull sandpaper will just heat up the epoxy,causing it to lift and fail.
    Power planing will probably leave a bigger mess and maybe damage, which will STILL need expert fairing with a grinder. (or a million hours of torture boarding).How easy would it be to find yourself planing the thin layers of the wood molding . The planer blades would stay sharp for about 30 seconds.
    bruce
    Last edited by wizbang 13; 10-11-2017 at 07:57 AM.

  3. #3
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    Default Re: gel peeler

    If there is glass in the epoxy sheathing your planer knives are not going last more than a few minutes.

    Like Wiz says you need sharp sand paper, you want stearated paper. It doesnt clog as easily as regular paper and is worth the few extra pennys.

  4. #4
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    Default Re: gel peeler

    It looks like lots of burst bubbles-presumably osmosis although I thought you only got that in lay up cloth

  5. #5
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    Default Re: gel peeler

    Osmosis ? Ya I think that is a different chemistry.
    Can you get to the boat and pick at some of these blisters and photograph them? Try to pull the cloth off by hand beyond the bubbles. Are you sure it is even epoxy?
    We can focus ideas and help much better with more info.

  6. #6
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    Default Re: gel peeler

    There is no cloth only what sands off like epoxy. Will photogrpah when next down in about a weekTapestry.jpg

  7. #7
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    Default Re: gel peeler

    I'd be very afraid of reducing the thickness of a cold molded hull. The stiffness of the panel declines drastically with thickness and the shell is almost all the structure you have.
    Heat gun and scraper followed by an aggressive RO sander like the Festool Rotex would be effective but controllable.
    Last edited by JimConlin; 10-13-2017 at 09:22 PM.

  8. #8
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    Default Re: gel peeler

    UV damage?

    Jeff

  9. #9
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    Default Re: gel peeler

    gel coat planers have carbide cutters. even they don't last very long. Looks like UV damage also. (the long term disadvantage of epoxy)
    Denise, Bristol PA, Oday30, Anchor Yacht Club, On tidal Delaware River. my current project; http://forum.woodenboat.com/showthre...0-Ducker-Resto

  10. #10
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    Default Re: gel peeler

    No cloth!
    Yikes I would wood her (disc polisher with 8 inch softpad,24/36 grit) ,dry her , and give her 2 layers of dynel. Then modern epoxy/LP coating.
    Yes it seems to be baked by the sun.
    Those familiar with uv damaged epoxy can tell instantly by the smell of the sanding dust.
    bruce

  11. #11
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    Default Re: gel peeler

    AS, the veneers on this boat are likely 1/8", even a cautious sanding is going to remove a lot of cedar( at least thats what I would guess...) I'd sand it as judiciously as I could, glass and epoxy coat, and then decide if paint. or varnish are your friends... Cheers, S

  12. #12
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    Default Re: gel peeler

    Agree with what Wizbang said above, sanding will be far more controllable than planing and remove less structure given equal skill levels on both tools.
    I would use a very firm pad instead of a soft pad though. I was taught by Dudley, the master grinder on Lake Union back in the early 70's, how to use a firm backed, 24 grit, 7", slow turning grinder like a block plane to fair new hulls and decks.
    A proper video might be able to communicate the technique, but here is a shot: basically you never turn the pad on edge, you just 'think' about that quadrant of the disc you wish to do the cutting and that bit of pressure and a sweeping motion makes this tool your block plane motion. If you have ever used a floor polisher you know the idea of slight up and down pressure on the handle to make the thing move left and right on its own...without smashing the walls.
    Remove the side handle from the grinder and put one hand right on the rounded business end of the tool, the other hand on the trigger. AFter awhile, the hand over the end of the tool will start to feel the high spots, just like you do with a hand plane.
    Get a 2 x12, paint it with anything and then try this technique to remove the paint and leave a fair surface. A random orbital sander will work as well, I love my old Fein unit.
    Remember, there was a time when your muscles and hands had to learn the proper techniques of using a hand plane to achieve a straight and square surface.

  13. #13
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    Default Re: gel peeler

    I dig Dudleys old quote " like Barbie waving to Ken",the sander motion.
    Here is what I mean Paul, the thinner blue softie ,not the inch plus thick one.
    The pad needs to lead, not follow bumps,for fairing.

    bruce

  14. #14
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    Default

    Quote Originally Posted by wizbang 13 View Post
    I dig Dudleys old quote " like Barbie waving to Ken",the sander motion.
    Here is what I mean Paul, the thinner blue softie ,not the inch plus thick one.
    The pad needs to lead, not follow bumps,for fairing.

    bruce
    That's what we used when we restored my 1934 baby grand piano! NOT!

    Good gawd, you guys can't stress enough the damage one can do with one of those, but I guess long fairing board manufacturers appreciate it!

    Sent from my LG-M430 using Tapatalk
    Denise, Bristol PA, Oday30, Anchor Yacht Club, On tidal Delaware River. my current project; http://forum.woodenboat.com/showthre...0-Ducker-Resto

  15. #15
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    Default Re: gel peeler


  16. #16
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    Default Re: gel peeler

    I have only the experience of my eyes watching Dudley fair the top sides of a 65' motor yacht, planked in red cedar, with the wedges seams splines just having been slicked off, all this faired to baby butt smooth fairness. The paint crew primered and used very light putties. I actually do not remember any long boarding after Dudley was done.

    And the experience of my own hands, fairing newly laid teak decks, fairing the carvel planked/wedge seamed 'Eel' hulls I built, etc, along with re-planking jobs where most were shutter planks...all faired with grinders and stiff pads.

    Any tool poorly used can create damage, the brief description of the technique I gave can be tried by anyone, preferably on a piece of scrap to test the technique a bit before attempting to fair your recently completed hull or deck.

  17. #17
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    Default Re: gel peeler

    And yes Wizbang, Barbie waving.

    Also that plastic backer pad is probably pretty good. Dudley was always on the hunt for the old resin or phenolic backed pads that were 'just right' in their stiffness and give. Can't remember exactly what they were made of, but they are long gone.

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