Showing posts with label hotcoat. Show all posts
Showing posts with label hotcoat. Show all posts

Sunday, May 27, 2012

Marilyn's board almost done!


I have not been posting on Marilyn's board at all, so here's some catch up. Last we left off that I had the cloth cut and the board ready to be glassed on the bottom. I practiced first on a handplane to do this type of color work while glassing because i'd never done this type of design in teh color. Psyched I practiced, as that one practice helped alot. Marilyn and Mel both helped me glass the bottom, as I was intimidated to do it by myself and get it all done before the epoxy gelled. It came out great! Marilyn was pumped, and so was I. We wrapped the rails with a cut lap, and then once it gelled, cut it off at the tape line, to have a nice line where the green cloth ended on top of the board. see below

 Bottom of the board, looking great! this was a design modeled after a leaf that Marilyn at their place, and it came out pretty awesome, thanks to the help from Marilyn and Mel!

 Top of the board, with the cutlap cut. Looking good too! My cut lines weren't perfect though, so pinlines are needed to hide the shakiness of my cut lines. Again, never done those, so psyched to try it out.

 I glassed the top of the board by myself (no colors involved here, so a bit easier to handle) and it came out super good too. psyched I did it all in time, and with some to spare. you feel high or something when you do a good glassing job, i like it. This above photo is after I hotcoated the board. This is where you just paint clear epoxy over the glass job you already did to smooth it all out. "don't even touch barney! that's a fresh hotcoat!"

 Then i mounted in the fin box for the board. I used a spare fin i have to put it into the fin box, and have a reference to make sure it is perfectly vertical and the box is therefore in perfect also. The epoxy has a property where the larger the volume, the quicker and hotter the reaction takes place when it starts to harden. So the issue here is that you carve out this rectangular hole in the board to mount the fin box into, and then pur epoxy in, push in the fin box, and get it aligned and everything while it cures. There's horrow stories of guys melting the foam inside the board some when doing this, because of the exothermic reaction that takes place, so a trick is to hold an ice bag against the opposite side of the board, to keep it cool. You can't see it, but that what the duct tape is doing there- holding an ice bag against the bottom of the board while the epoxy cures. I also have an air pump, for air mattresses, sitting on the board running as this creates some vibration throughout the board, and if there are any bubbles down in the epoxy, it helps them rise up to the surface and pop, and then there's no potential air pockets or anything anywhere. I've seen this done with other stuff, but not too sure how much it helped here.
I just masked off the top of the board and painted on the pinlines to hide the cutlap line. I've never done this, so hopefully it comes out well. I used tinted epoxy resin and painted it on. Once it starts to gel, you pull the tape and it should be a clean line, as long as you pull the tape at the right time..... hope i do that.

Sunday, April 22, 2012

More progress

Got some more progress to report. Very close to being done! Thought I'd be done this weekend, but no.... Close though

Made the leash loop last weekend. Carpenter's pencil wrapped in parchment paper (doesn't stick to resin) worked just great! The leash loop is just fiberglass rope/thread, drenched in resin. Keep it bunched up and together where it's off the board, and then spread it out where it touches the board, like roots stretching out for support. Then you can sand it pretty smooth where it attaches to the board.


Tilt your head to the right here. Finished leash loop!



Then I hot-coated the top of the board last Sunday! Looked nice getting it all shiny!

Glimmering. I just tape off halfway down the rail, at the apex, and then put little tape balls on the underside, so the tape doesn't wrap around and let dripping resin flow onto the bottom of the board

Tape balls on underside

Some fins I was working on. They started to not look so good, so I've abandoned them for the time being. They will be finished though...

Then I hot coated the bottom of the board on Monday

Shiny. I then let it all dry for a few days, thinking I may just leave it all unsanded and it'd be done and ready. But my hotcoating isn't exactly perfect, so I started to sand it with fine grit sandpaper this weekend, which will eliminate the shiny-ness, but it'll at least look smoother (partly because it will in fact be smoother, and because it won't be shiny and shiny things show every little imperfection). And also I'll claim that I don't want my wooden board to look plastic-y. More photos to come of it finished!

And started on other fins since I didn't like those ones I made. I spliced a piece of cedar so that each fin has the same grain pattern. I like it... unfortunately the many layers of cloth and amber resin (bio-epoxy I've been using) on each side kinda hide the detail of the grain...Need to use clear epoxy on future ones.

They're thin, bc I need to put 7-8 layers of cloth on each side to make them strong enough to not break off when surfing, and still fit into the fin box

I put 7 layers of fiberglass cloth on each side to begin with (one at a time, but right after each other). Then I check to see if they fit into the fin boxes and adjust them to fit. I made a few sets of fins with 2 or 3 or 4 layers of cloth on each side (didn't pay too much attention to it in my first attempts), but they broke pretty quickly, so I'm sticking with at least 7 as one set has lasted long with that many.