This past weekend I had five full days to play. I'm normally off Friday through Sunday and Veterans Day fell on a Tuesday so I took Monday off to take advantage of a streak of nice weather. Friday through Sunday were clear but the temperatures barely got above 50 degrees. Friday and part of Saturday I sanded and cleaned the teak on the Starboard side from the bowsprit back to the gate near the cockpit. I got one coat of varnish down late in the afternoon and it looked good. Sunday I had to wait until later in the afternoon to lay down a second coat because it was still a bit tacky. I added a coat across the stern while I waited. I finished the starboard side coat by 1600 and called it a day. Monday I got up early and went out to see how things looked. All the varnish I had laid down on Sunday was fogged and patchy looking. All of it. Ugh! I envisioned having to strip everything back down to bare wood and starting all over again. I'm running out of time though and really cold weather is right around the corner.
I Googled "fogged varnish" and found that it's caused by the varnish not having enough time to "flash off" and dry before dew settles on it. According to Wikipedia "The dew point is the saturation temperature for water in air. The dew point is associated with relative humidity. A high relative humidity implies that the dew point is closer to the current air temperature. Relative humidity of 100% indicates the dew point is equal to the current temperature and that the air is maximally saturated with water". When varnishing, the dew point must be at least 20 degrees less than the air temperature or you're gonna have problems. At least that's what I read. On Sunday the air temperature was around 51 degrees and I suspect the dew point was around 40 or higher. I read on and found that the finish can be saved by scuffing the surface to allow the trapped moisture to evaporate. Of course this requires warm temperatures. Fortunately the temperatures for Monday and Tuesday were forecast to be in the 60's and clear. Perfect!
Monday morning Cheri and I talked ourselves into stripping down the teak on the cockpit coaming so everything would be done at the same time. I sanded down my fogged varnish and let it sit all day while we worked on the coaming. I figured things would be perfect by Tuesday for laying down a coat of varnish and having everything protected before bad weather settled in around the middle of the week. While Cheri sanded the coaming I worked on re-bedding the stanchions.
Tuesday I had some touch-up sanding to do on the coaming so I took care of that before starting the varnish. It was still kinda chilly out and after suffering the fogged varnish I wanted to wait for things to warm up a little more anyway. Around 1000 I was ready to go at it and collected my brush and can of varnish and headed for the bowsprit. I just happened to glance out towards the breakwater and discovered a wall of fog quickly descending on our creek. Fog = high dew point, maximum saturation, 100% humidity. Grrrrrrr. I can't believe this! I put away my varnishing gear and moved on to my next project. Unfortunately I may be done with varnishing for quite a while. Winter is coming on strong and temperatures are projected to be in the low 40's and 30's for at least the next week. If I could just get a few more coats on it'd probably be OK for the Winter but I think even that's gonna be a challenge.
So, here we are. We're making progress here and there, even if it's not as much as I had hoped for. Even if the varnish project is stalled I can continue to work on the stanchions and railing. My project list intrudes on my sleep almost every night but if I keep chiseling away at it I can keep it at bay. I have a plan. The ultimate goal is to get the water maker installed this Winter. To do that I need to install some cabinets in the aft cabin to make room for the stuff located where I want to put the high pressure pump. The cabinets will also make a spot for our tools which in turn will open up some more storage around the boat. I have about three months to get these things done and install a single side band radio too. Should be do-able. Then next March we'll pull the boat, repaint the bottom and finish up the teak. Then splash and run. That'll be it.
4 comments:
Eek, bedding with 5200. I've always been under the impression it was better to bed with something that could flex. Would be interested in your opinion on that one.
Actually, 5200 retains quite a bit of flex over time. I'm assuming these stanchions had never been re-bedded since the boat was built in 2001, 13 years. When I removed them the adhesive was still pliant and extremely difficult to remove, both from the teak and the stainless steel. It still had a firm, rubbery feel. The adhesive the factory used was 5200 and I feel confident it will give me many years of service. Check out this link (http://solutions.3m.com/wps/portal/3M/en_US/Adhesives/Tapes/Products/~/3M-Marine-Adhesive-Sealant-5200?N=5510818+3294314620+3294314622&rt=rud) for more info on 5200.
Brave man - all varnish! I can only deal with little bits of varnish, though I love the way it looks.
Rick
Good info. Appreciate your opinion and the link!
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