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I laid down two coats of West System epoxy, imbedding 12oz Rafa fiberglass in the second coat. Then I put on four flow coats of epoxy with graphite. I had trouble using the foam roller RAFA recommended to spread the graphite/epoxy mix. It just created a thousand little mounds/bubbles. It looked like the stippled surface of leather. I tried it after different periods of time after pouring out epoxy, thinking maybe I waited too long the first time or too soon on the second coat. However, each coat reacted the same way. Afterwards I thought that maybe I needed to saturate the foam roller first. I noticed some people use a half roller. Are you supposed to lock the roller and just spread the epoxy with a fixed roller? I am going to just lay down two coats of epoxy without glass on the sides, so I would like to figure this out before I start on the visible portion of my project. Any thoughts on what I am doing wrong?
thanks. I ended up spreading and smoothing the epoxy with a brush, so I guess I ultimately finished it as I should have. It turned out OK but not as smooth as I would like and it took a lot longer. I think I also worked too large an area at a time as well. In all the discussions and videos I watched and materials I read, no one mentioned the follow-up to the roller with the brush. Glad you mentioned it.
My approach was to use half of a foam roller. Saturate it with epoxy, keep it wet, and use slow strokes. Then tip with a wide foam brush. Don't expect epoxy applied over bare plywood to level out particularly well - I sanded with 150 between coats. The final coats of varnish is where you'll be able to achieve a level finish.
I found the thick glass for the bottom to be alot rougher to work with than the thin stuff on the sides. I didnt worry about getting the bottom smooth and flat like my sides either. Also coating the wood first with epoxy prior to applying the glass helped seal in the wood and made for less gas type bubbles. I did a bunch of coats to get the glass embedded and somewhat smooth,then a couple final coats with a little of the graphite I called it done. Ive been varnishing my sides though over the glass work.
Looks like you got er done though.
Kirk,
Check out this video, it has the basic elements of glassing cloth with epoxy.
https://www.youtube.com/watch?v=qsupx-IXOzU
There is no video explanation but the elements are there. Laying out fiberglass, wetting it out with epoxy, removing the excess and applying a fill coat.
Note; The fill coat starts at about the eight minute mark of the video and the guy uses a brush to tip off the rolled filler coat of the epoxy.
There are a couple of subsequent videos on filling the glass, they might add to the process of applying epoxy.
I also have found round 1" diameter foam rollers "Suck" for rolling on epoxy, just my humble opinion. I use West System's Yellow Rollers, they are made for this, like in the video above. Also there are 4 1/2" x 1" diameter cloth rollers, a Mohair Blend that work nice too and they are two for $ 5.00, less costly. They are good for enamels, varnishes,urethanes and epoxys. I get them at a local home paint store.
Anyhow hope you get it done to your satisfaction!
Dorf
The west system rollers (and tipping) do a great job over a brush for large areas. Less sanding to get smooth. Cutting them in half makes them not as expensive. The bottom doesnt matter much. My bottom is still a little rough. That heavy glass is just tough to fill over, the fish wont care...I did couple coats of epoxy on sides, sanded smooth then glassed. Using thin 6 oz glass is super easy to fill over and comes out really nice, it was kinda fun actually. (unlike the bottom glass). I was gonna paint but the glass came out pretty clear so I decided to leave it natural.
An update on my project. I finished the exterior, (except for varnish and oiling chine cap). A friend is going to repaint the "ghost fly" for me, so I need to wait for him to get that done before I varnish. Hence, I am moving on to the interior.
Chine cap in place but not trimmed up yet. The old chine cap had screws every 2.5 to 3 inches, but that included aluminum cap screws. I used about a 6 inch spacing, but where there was a tighter radius I shortened spacing. Does this sound about right?
The ghost fly shows through the three coats of epoxy, quite well.
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