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Epoxy: Spikes, clots, and bubbles
By:pikabike
Date: 11/12/2003, 1:15 am

I filleted and taped the interiors of the hull and deck this past weekend. Looked OK. But like a kid who can't stop painting a picture when the picture's done, I got ambitious and decided to also add a layer of 4 oz. glass over it all. Now it doesn't look so OK. :-(

First of all, the glass retained lots of long threads at the edges, no matter how carefully I cut the cloth. After epoxying, some of those threads are needle-sharp spikes. Yes, I punctured my finger on one. I think the only thing to do about those is trim them as best I can, then sand the edges down. If anybody has a better idea, please post a reply with description of what to do. I intend to remove those bleeping spikes Wednesday, before they inflict any further injury.

Second, there are lumps in many places. I have been shaving some of them down with a scraper and will probably leave them alone other than that, as long as they contain epoxy and not air. Some of the lumps formed from "fur" shed by the cloth as I spread the epoxy or squeegeed. I did wipe off these clots if I could, but in some cases the clot contained a long thread that, when pulled, began to unravel the cloth at an edge! Eeeew. So I left those clots in place and figured I'd shave/sand them down after they dried. Actually, it's gonna be SAND with a Dremel tool, because by tomorrow the epoxy will be pretty hard.

Last but most important, I do have some bubbles. Not just the teeny ones that came from too-vigorously-mixed epoxy (a lot of those closed up before drying anyway). I have some larger bubbles here and there also. While the epoxy was wet, I took pains to press down on any seams/joints with the tip of the paintbrush or the edge of the squeegee, so I managed to remove any large bubbles from the joints that way. But there are bubbles in other areas. Do these bubbles pose a structural problem? I presealed the wood before putting any glass down, so there is no raw wood directly under the bubbles. (I tried to squeegee those bubbles out, but usually that would move the cloth, resulting in more bubbles elsewhere!)

Lastly, will glassing the exteriors be easier? The interior was a pain, but I'm thinking the convex outer surface will be easier to do a neat job on. At least excess epoxy can be squeegeed DOWN and right off the edges.

Messages In This Thread

Epoxy: Spikes, clots, and bubbles
pikabike -- 11/12/2003, 1:15 am
Re: Epoxy: Spikes, clots, and bubbles
LeeG -- 11/12/2003, 9:56 am
Re: Epoxy: Spikes, clots, and bubbles
pikabike -- 11/12/2003, 5:20 pm
Re: Epoxy: Spikes, clots, and bubbles
LeeG -- 11/12/2003, 6:09 pm
Kit's recommendations
pikabike -- 11/13/2003, 1:53 pm
Re: Kit's recommendations
LeeG -- 11/13/2003, 5:34 pm
Re: Kit's recommendations
pikabike -- 11/14/2003, 12:44 pm
Re: Epoxy: Spikes, clots, and bubbles
Robert N Pruden -- 11/12/2003, 6:48 am
Re: Epoxy: Spikes, clots, and bubbles
pikabike -- 11/12/2003, 5:10 pm
Re: Epoxy: Spikes, clots, and bubbles
Robert N Pruden -- 11/13/2003, 6:15 am