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Wed Dec 20, 2017 6:25 am

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Thanks Eric and Howard, for the feedback regarding bailers. Eric , the boat is looking great.

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Builder of SCAMP#349 "Argo": Build log at http://www.argobuilder.com
Caretaker of these fine ships:
-SCAMP "Argo"
-1981 Compac 16 Pilothouse "Lillyanna"
-Old Towne 16' Canoe



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Wed Jan 10, 2018 10:42 pm

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After sanding the final 3rd coat of epoxy on the hull, I found some pinholes here and there where I fiberglassed. These little holes (1/64”-1/32” wide in between the weave) can be deep and don’t fill just by rolling epoxy on, so I skim-coated those areas with epoxy spreaders. A good amount of force and low angle filled most of them. Then, moving a lamp around, squinting, and cocking my head at angles, I caught and spot filled the rest.

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Then on to dry-fitting the UHMWPE runners for the skegs. I put a lot of screws in (around every three inches where I pre-drilled and filled) to try to keep them stable with temperature changes. Once the hull is finished, the runners will be roughened up with 50 grit, brushed with a blue flame (propane torch) to prepare the gluing surface, and then epoxied on. The runners are 1/4”x1.5”, so are flush with the skeg sides which will hopefully help protect the wood.

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Thu Jan 11, 2018 7:10 am

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Eric, I love the look and design of your routed out finger holds. They appear big enough to actually work.

Also, I'm anxious to hear how the UHMW stays in place or moves with shifting temperatures. I'm planning on using it also for skid material, but will probably just screw it down in a manner that allows it to shift slightly, maybe with 1/4" - 3/8" slots in the UHMW. Your boat is looking really nice.

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Brent Butikofer

Scamp: Hagoth
https://buildinghagoth.wordpress.com

Scamp: Shackleton
https://buildingshackelton.wordpress.com

Skiff America 20: Northern Cross
https://hamnegger.wordpress.com

Never Stop Learning or Exploring



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Sat Jan 13, 2018 9:46 pm

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Thanks Brent. I’ll let you know if they hold. It’s amazing how much they expand/contract with temp. - my strips moved maybe 1/4”-3/8” with a 30 degree difference. Hopefully I can glue them on with g-flex in a week or two, with enough winter left for a number of hot-cold cycles (I heat up my garage to work on the weekends and it’s unheated during the week), so I can test them a bit. If they shear/break loose I might rethink, and maybe try your approach or switch to more traditional materials.



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Sun Jan 14, 2018 6:47 pm

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Eric, thanks for doing the brain damage on this one! I'm very interested to learn how this turns out for you. I'll be facing this same issue later this year.

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Brent Butikofer

Scamp: Hagoth
https://buildinghagoth.wordpress.com

Scamp: Shackleton
https://buildingshackelton.wordpress.com

Skiff America 20: Northern Cross
https://hamnegger.wordpress.com

Never Stop Learning or Exploring



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Sat Jan 20, 2018 10:01 pm

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5 layers of graphite/epoxy below (and a little above) the waterline:

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This feels like another milestone - the beginning of the finishing...



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Sun Jan 21, 2018 12:52 pm

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Looks awesome Eric! I imagine you can already feel the wind on your face...



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Sun Jan 21, 2018 5:08 pm

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Eric, did you experience multiple layers of graphite epoxy interacting with each other causing the surface texture of the finish epoxy to take on an odd, textured finish? This has always happened to me when coating graphite epoxy over graphite epoxy. Just curious if this happened to you and how you overcame it.

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Brent Butikofer

Scamp: Hagoth
https://buildinghagoth.wordpress.com

Scamp: Shackleton
https://buildingshackelton.wordpress.com

Skiff America 20: Northern Cross
https://hamnegger.wordpress.com

Never Stop Learning or Exploring



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Sun Jan 21, 2018 9:50 pm

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I sure can. Thanks jhippe.

Hi Brent - I get orange peel texture. I would have to experiment to figure it out. My first thought is that, because I’m lazy and don’t want to mix multiple batches of epoxy, by the time I’m finishing rolling a layer (which leaves texture), it’s already gelling and tipping off doesn’t have as much smoothing/leveling effect. But maybe it’s a weird surface tension thing. I sanded in between layers 3 and 4, and will sand the 5th down a bit...

My orange peel:

Attachment:
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Tue Jan 23, 2018 1:43 pm

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The secrets are:
1. Thoroughly mix graphite into epoxy until smooth.
2. Make sure the hull or surface your applying on is warm and that the epoxy is warm.
3. Mix small batches.
4. Roll a small area, perhaps 2x3 feet and immediately tip, move on.

Hope this helps



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