Jump to content


Photo

Removing Epoxy


  • Please log in to reply
19 replies to this topic

#1 madyottie

madyottie

    Strike 3. Woods Strike 18 Trimaran

  • Advanced Members
  • PipPipPip
  • 909 posts
  • LocationDeepest Darkest Waikato

Posted 07 October 2019 - 07:21 PM

So, recently I bought an old Noelex 22, and have been slowly beavering away trying to bring it up to scratch.

Bought sails, replaced mast, designed rig tension system, put it mostly in position.

The rudderblade was barndoor sized, and weighed a ridiculous amount, not to mention having some mild steel packers, which rendered the whole rudder useless and immovable.

So anyway...

Bought foam, designed blade, cut blank, shaped, added unidirectional strands to stiffen it up, and laid rovings over the top.

All with West epoxy.

So far so good.

Decided to add a further layer of 100mm tape along the leading edge incase I hit things.

I realised I was out of hardener, and went to the nearest big box hardware store, and bought 500g of Ados epoxy. Mixed according to directions on the packet, looked ok.

Applied to the rudder, and a week later it's still only partially set. I've removed the tape now.

Does anyone know how to remove partially set (well, not set at all, but sticking to the West under it) epoxy?

I can scrape some of it off, but turps does nothing. The crap epoxy sticks to everything it comes into contact with. It just doesn't go hard. doesn't respond well to sandpaper, I seem to be removing the good stuff while the crap just clogs the paper.

Any ideas gratefully received.
  • 0

3mm ply is no match for 110kg size 11 boots! Anyone know how to fix my foredeck?

 


#2 Brien

Brien

    Advanced Member

  • Advanced Members
  • PipPipPip
  • 203 posts
  • LocationHamilton

Posted 07 October 2019 - 07:37 PM

Try vinegar. It removes epoxy from hands so might work. If you try it let us know how it goes.
  • 0

#3 Maté

Maté

    Sailor

  • Marine Forums Only
  • PipPipPip
  • 3,699 posts

Posted 07 October 2019 - 08:07 PM

Heat gun


  • 0

"Never argue with a fool; onlookers may not be able to tell the difference." - Mark Twain


#4 madyottie

madyottie

    Strike 3. Woods Strike 18 Trimaran

  • Advanced Members
  • PipPipPip
  • 909 posts
  • LocationDeepest Darkest Waikato

Posted 07 October 2019 - 08:33 PM

Tried the heat gun earlier, heat doesn't differentiate between set and not set🙄
  • 0

3mm ply is no match for 110kg size 11 boots! Anyone know how to fix my foredeck?

 


#5 Clipper

Clipper

    Advanced Member

  • Advanced Members
  • PipPipPip
  • 3,842 posts
  • LocationAuckland

Posted 07 October 2019 - 08:34 PM

Acetone?
  • 1

#6 madyottie

madyottie

    Strike 3. Woods Strike 18 Trimaran

  • Advanced Members
  • PipPipPip
  • 909 posts
  • LocationDeepest Darkest Waikato

Posted 07 October 2019 - 08:34 PM

Vinegar could be the secret, I'll give that a crack tomorrow
  • 0

3mm ply is no match for 110kg size 11 boots! Anyone know how to fix my foredeck?

 


#7 Island Time

Island Time

    Advanced Member

  • Administrators
  • 7,028 posts
  • LocationHome from Cruising, Now Gulf Harbour

Posted 07 October 2019 - 08:41 PM

Epoxy thinners will remove what isn't set...


  • 0

There is nothing, absolutely nothing, half so much worth doing, as simply messing about in boats


#8 wheels

wheels

    Advanced Member

  • Advanced Members
  • PipPipPip
  • 16,801 posts

Posted 08 October 2019 - 05:25 AM

Epoxy Thinners.
NEVER mix different brand products. The hardener is made to exactly match the Resin.
Also, be very careful heating uncured Epoxy. The smoke fumes are terribly toxic and can make you very ill and so sensitized to Epoxies, you will never be able to go near it again.


  • 0

#9 madyottie

madyottie

    Strike 3. Woods Strike 18 Trimaran

  • Advanced Members
  • PipPipPip
  • 909 posts
  • LocationDeepest Darkest Waikato

Posted 08 October 2019 - 12:51 PM

As a thought, if I were to bush hardener over the unset stuff, would it harden?

Or even harden enough to sand/mechanically remove?

Although if it didn't harden in correct ratios, it probably never will.

Wheels, I wasn't mixing products, this was a fresh layer
  • 0

3mm ply is no match for 110kg size 11 boots! Anyone know how to fix my foredeck?

 


#10 Maté

Maté

    Sailor

  • Marine Forums Only
  • PipPipPip
  • 3,699 posts

Posted 08 October 2019 - 03:19 PM

Don’t do it, just persevere with scrapers, xylene, heat. There is no easy way, but you could leave it for a week and see what happens. I got out of jail once using the wait and see method
  • 0

"Never argue with a fool; onlookers may not be able to tell the difference." - Mark Twain





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users