Tampilkan postingan dengan label coat. Tampilkan semua postingan
Tampilkan postingan dengan label coat. Tampilkan semua postingan

Sabtu, 16 April 2016

Second coat

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After all that sanding yesterday, I spent a good deal of time cleaning up my "shop". After sweeping, vacuuming, and wiping down the strakes, they got a second coat of epoxy. It was today that I noticed a couple of spots where I had sanded through the first coat down to the wood. Mostly it was at the one lousy scarf joint, where there was a high spot. But there were a couple of other little nicks where I wasnt paying complete attention with the sander. I tried to lay the second coat on a little heavier in these spots to make up the difference. But I will probably turn to the CLC boat builders forum to ask what I need to do in this case. Should I apply a third coat? A spot second coat in these areas? Nothing, and leave it to the varnish or paint to give supplemental waterproof-ness? Local temps are in the upper 60s, and so I can give the flip sides their second coat tomorrow. The second coat goes on much faster, and requires less epoxy than the first coat. Also, the roller bubbles settle out on their own and dont require tipping in now that the wood is sealed. Total hours 8.75.

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Minggu, 10 April 2016

Sanding and second coat

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The bulkheads and seat parts got a good sanding with 120-grit paper, and then a second coat of epoxy. The long list of tasks to complete before I can start assembling, or stitching, the hull is finally starting to dwindle down. Unusually cold temperatures have persisted in central Alabama, so I put a radiator style space heater in the garage in an effort to speed the epoxy curing. The epoxy itself isnt volatile, and the heater is away from any clutter, so I think it will be safe. Ill keep a close eye on it, just to be sure. The experiment here is to see if a 1500-watt heater has enough power to change the temperature in a fairly large two car garage. Total hours 14.75.



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Kamis, 07 April 2016

Second paint coat

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The exterior hull went through another sanding and painting cycle last evening and early this morning. Last evening, I moved it out and sanded it lightly after the first coat of Interlux Brightside white. There was one drip, a few specks of dust or larger debris, and a couple of hairs (from me or the resident cat, I cant be sure). I started sanding with 220-grit paper on my orbital sander, but found this left an undesirable brownish tinge to the paint that was the same color as the grit in the paper. For whatever reason, the same paper left no mark if I sanded by hand using a sanding block. So this is what I did in the humid evening air. After that workout, I wiped down the dust from the hull and moved it back into the shop, then masked the edges again with tape and newspaper as previously. I didnt paint in the evening, since the garage door needs to be open for ventilation, but the lights would attract too many bugs in the evening twilight. So early this morning, the hull got its second coat of paint. The sharpness of the shine seemed to improve noticeably after the second coat.

Before applying the third coat of paint using the method above, I may do some varnishing of the interior. The main reason is that my assistant for moving the boat will be unavailable for the next week. But if I flip the hull over, I can put it on the trailer and move it out for sanding and in for varnishing single handedly. Total Hours 89.25.

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Senin, 04 April 2016

Second bottom coat

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After an enjoyable weekend with guests from out of town, it was time to return to boatbuilding. Tonight the exterior got a second coat of epoxy. But before it was rolled on, some sanding was needed. Because the exterior #1 panels had previously been coated with their first coat, a bit of sanding was required to smooth out what may have been outgassing. Also, the bottom panel with its layer of fiberglass benefited from some sanding to knock off the tops of epoxy on the weave. This sanding reduced the amount of epoxy that would required to fill the weave. Total hours 63.75.

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Selasa, 15 Maret 2016

Second interior coat

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The interior of the hull got its second and final overall coat of epoxy. The lesson of tonight is that lighting is important. After the first coat, things looked good. Then while I was glassing and assembling the daggerboard trunk, I used the excess epoxy to give some crevices and joints a little extra coverage. With a foam brush, I really worked the joints, forcing epoxy into any gaps or voids I could find. I was satisfied with the effort, until the next morning when I opened the shop (garage) door. In the sunlight were some drips and runs that I hadnt seen, even under the glare of my 1000-watt worklights. The lighting just wasnt at the right angle. I was crestfallen the rest of the day, thinking about the flaws in what I had thought was a superb job. So tonight, a few deft touches with a belt sanded and 120-grit paper made quick work of the drips. Then I was off and running on the second coat. This one finally filled the weave of the bottom glass, and sealed the lapstrake joints once and for all.

Ill take a well earned day off tomorrow to celebrate the weeks end with my wife at our favorite pizza joint. Then this weekend comes the permanent installation of the bulkheads and daggerboard trunk/seat unit. Total Hours 54.50.

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Selasa, 08 Maret 2016

First bottom coat

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At this stage, the instructions call for two coats of unthickened epoxy on the entire exterior of the hull. The exterior sides of the #1 strakes to this point have not received any epoxy coating, and the layer of fiberglass on the bottom panel still requires that the weave be filled. A good session of sanding preceded the first coat of epoxy. I made sure to smooth down all the filled stitch holes, as well as some little "spines" of cabosil-epoxy that had wicked up underneath some of the stitches as the seams were glued. When the wires were removed, these little ridges remained and had to be sanded away. After a tedious period of sanding, I mixed up some unthickened epoxy (it turned out that 14 pumps were necessary to cover the whole hull and transoms) and rolled it on. I am eyeing my epoxy supply with a little apprehension: after the coating of the hull, no tasks remain that require large batches to be mixed. Even so, plenty of little things remain that require epoxy, like coating of rudder and daggerboard parts, gluing the motor pad, filleting seats and knees, and the like. I have been careful to be economical with what was supplied with the kit, but I hope what remains will hold out. Total hours 61.25.

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