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About MartinRF

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    Stockholm, Sweden

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  1. I will know nothing about that until April or May. There will be an update if I observe anything interesting when the boat leaves the water for this season in a few weeks time. /Martin
  2. My plan was to wait till after the boat was out of the water. In short: Works as advertised by which I mean, yes things grow but they are really easily removed. This includes barnacles. I can't just brush them off but a mild nudge with a finger is all that is needed. I have had to clean the boat more but since the work has been easier the sum of work is roughly the same. The only disappointment is how rough the surface is. I have done some more research and now I know what to use for thinning this paint. I will try that for next season. I doubt you really have to repaint each se
  3. Finally hit water today. /Martin
  4. All about the boat here: https://www.reflectometrist.eu/ /Martin
  5. Yes, I intend to keep you posted. Yes, short mohair roller. I was coached on the procedure by a recently retired Hempel employee who my old boat building buddy knows through his job as a marine engineer. Disclaimer: my coach admitted that he had no first-hand experience of applying Hempaspeed TF, I will try to quantify and document the 'smoothness' before launching. /Martin
  6. So I ended up doing a complete antifouling 'facelift'. It cost me a month of our sailing season plus, of course, a bunch of money. I went for Hempaspeed TF which is not silicone based so this post is off topic. Hempaspeed TF is a bit odd to apply as it is rather viscous and I found it would not flow to a smooth surface which is a bit of a dissapointment after all the work. It is glossy which is also a little odd for an antifouling in my experience. It will be interesting to see if algae and barnacles like it. /Martin PS It is my understanding that Hempaspeed TF is currently
  7. Kim Klaka used to hang out on rec.boats on Usenet. He is (used to be?) a researcher at an institute or uni in western Australia. Lars Larsson used to be a hydrodynamics professor at the university I got my degrees at (*). My brother was one of his PhD students. My brother met Kim Klaka during a trip down under in 1995. Now this pops up here. Small planet /Martin *) My boat was built in the workshop of the marine engineering department of that university. Usenet: https://en.wikipedia.org/wiki/Usenet
  8. Real hydrodynamists in white lab coats: http://web.mit.edu/hml/ncfmf.html Boundary layers: https://techtv.mit.edu/collections/ifluids/videos/32603-fundamental-boundary-layers /Martin
  9. That was a good start of the day and week. Now I have to bicycle to work. /Martin
  10. Sea-speed and Hempel SilicOne mentioned so far. Sea-speed is not available where I live as far as I know and SilicOne seems to be fased out and replaced by Hempaspeed TF. Anyone with experience of Hempaspeed TF? It is said to be less complex to apply and hard rather than soft. /Martin
  11. Very interesting discussion. I am currently at this stage: This is just testing to see how hard it is to remove the old stuff. Sooner or later I will have to re-do the antifouling from the ground up. Probably not this time as I am running out of time and would like to do this thoroughly including some filling and long-boarding. I gather from what I read here that a silicone-based system may be a good fit for me but there is no easy going back. /Martin https://www.reflectometrist.eu/
  12. Water skis? Tonight's temperature is not typical and sea ice is melting. https://www.smhi.se/oceanografi/istjanst/produkter/sstcolor.pdf /Martin
  13. Over here daylight saving just started and the nearby airport reported -8 C tonight. But, yes, sunny and drifty. /Martin (need to wait a little before I can apply that coat of epoxy to my decks...)
  14. MartinRF

    UV Damage

    Having watched this happen to my clear coated decks my conclusion is that the UV filter is not good enough to stop the epoxy below from breaking down. It only slows it down and eventually the bond between epoxy and clear coat gives up. The clear coat flakes off. Wait long enough and the wood below the epoxy laminate is affected enough for that bond to break. This never happens where I have paint on top of the epoxy. Wood-epoxy cat. 35 years in Sweden so less UV than you have. https://www.reflectometrist.eu/ I am re-doing the clear coat on the decks this spring. I am scraping off the
  15. 39 years ago I took this photo between two winter storms. /Martin
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