Modest Knowledge 
                Writing letters and emails seemed to take up much of Mike Rowe’s 
                  time, but he tried to answer his correspondence carefully. Throughout 
                  his life he had benefited from other people’s writing, 
                  and owed much to teachers he had never met. Within the limitations 
                  of his experience, he tried to pass on his modest knowledge. 
                “Dear Bill, 
                Thanks for your recent letter. It is good to hear that the 
                  project is progressing, and that you are starting to think about 
                  finishing systems, rigging, and powering options. I understand 
                  the excitement. 
                I have often tried to point out to people that the drudgery 
                  of scraping, sanding, marking and planing are all necessary 
                  evils. How else are you going to be able to stand back and enjoy 
                  the satisfaction of looking at a boat of which you are proud? 
                  It probably sounds corny, but the more you put into the boat, 
                  the more she gives back. 
                Whatever you do, don’t fall into the trap of using shortcuts 
                  during the painting. There are all sorts of options when choosing 
                  a paint system, and many work very well. However, the ones that 
                  last have a common ingredient, and that is attention to detail. 
                  I have yet to discover a short-cut or miracle system which is 
                  capable of competing with a conventional specification. 
                As with so many things in life, an evolutionary method is better 
                  than a revolutionary method. The traditional systems have become 
                  traditional because they work! 
                You have already discovered that the choice of a particular 
                  system may well close doors to other systems permanently. Choose 
                  with care, and with one eye always on the time in the future 
                  when re-finishing comes due. Also consider the requirement for 
                  repairs to minor damage. 
                The systems which I use have varied with time, and with the 
                  availability of new materials. However, there is a consistent 
                  pattern to a successful paint job, regardless of the type: - 
               
              
                -  
                  
 Surface preparation 
                 
                -  
                  
Surface sealing  
                 
                -  
                  
Priming/undercoating 
                 
                -  
                  
Topcoating 
                 
               
               
                Skipping any of these steps will degrade the job, and use of 
                  cheap materials will de-value the boat much more than the initial 
                  saving in cost.  
                My favourite method for plywood or cold-molded construction 
                  is as follows: - 
               
              
                -  
                  
 Epoxy sealing with any of the good-quality 
                    saturating epoxies;  
                 
                -  
                  
Four coats of high-build epoxy primer/undercoat 
                    applied by brush (high quality brushes are essential for all 
                    work except glueing). I normally sand back heavily after the 
                    second coat, and then do a light sand after the third and 
                    fourth coat; 
                 
                -  
                  
Two, or three coats of high-quality topcoat. 
                    Depending on the nature of the job I use either a two-pack 
                    polyurethane (Hempel Polybest or Boatcraft Pacific Aquacote 
                    water-reducible polyurethane), or a top-grade single-pack 
                    alkyd enamel. Sometimes I spray (particularly with the Aquacote), 
                    but brush application is fine. Unless you have access to a 
                    supplied-air respirator, I recommend that you do not spray 
                    the solvent-based polyurethanes – once again, use a 
                    really good brush. Spraying single pack alkyd enamels is no 
                    problem, but use a filtered mask.  
                 
               
                
               
                Yes, I know that this is turning into a lecture, but I can’t 
                  help it – sorry! On to something different – 
                We had a good sail on the weekend in our sixteen foot dinghy. 
                  I know that you don’t like our un-stayed rig, but for 
                  what we have time for it is very good indeed. Our current standing 
                  lugsail was made by a man who understands traditional rigs, 
                  and it works incredibly well. Our elapsed time from driving 
                  into the car park to launching the boat fully rigged is seven 
                  minutes! 
                Barney’s rig is fast when hard on the wind, but it cost 
                  a fortune in stainless fittings and blocks, takes ages to rig 
                  and strike, and is vulnerable to the failure of any one of many 
                  fittings. If a part breaks, the rig comes down. His rig takes 
                  ages to set and strike - if we raced him out to the island and 
                  back, we would be on the way back in before he had left the 
                  harbour. 
                The sprit-boom has worked out really well. As an experiment, 
                  we set our sail with a conventional boom using a gooseneck, 
                  and the next time out used the same boom rigged as a sprit-boom. 
                  Without any question the sprit-boom is superior – it is 
                  self-vanging, doesn’t hit anybody’s head, and the 
                  snotter tension is easily altered to suit the conditions and 
                  point-of-sail. The effect is like changing gear in a car. 
                Being able to repair minor rig damage, independent of chandleries, 
                  is a real advantage. About the only breakage that would affect 
                  us seriously would be loss of the mast – anything else 
                  could be fixed with chewing gum and brown paper. You know, our 
                  rig doesn’t have one inch of wire, uses no bottle screws, 
                  no shackles, no vangs, no gooseneck, no sail track, no winches, 
                  no fairleads, no swaged terminals, no stays and only one pulley 
                  block! And yet we tack through ninety degrees with boat- speed 
                  and regularly plane downwind and on a reach. 
                Your John Welsford Navigator 
                  is going to be a great boat. The proportions are just about 
                  perfect for daysailing and camp-cruising, and the standing-lug 
                  yawl rig option will exhibit most of the above virtues. In fact, 
                  the rig will be better than mine due to the balance options 
                  the tiny mizzen offers – this will be of particular value 
                  when you reef the mainsail. Not only will rig balance be retained, 
                  but the mizzen will hold the boat up into the wind while you 
                  tie in the reef in the first place. In a squall, you could drop 
                  the mainsail in an instant (due to it being a lugsail) and continue 
                  sailing under jib and mizzen. Sail balance would be fine. 
                Ian’s Redmond Bluegill is just about ready for him to 
                  pick up. The spars from the un-stayed rig are short enough to 
                  stow inside the boat, and her proportions make her very suitable 
                  for rowing. When you consider that she can also take a ten horsepower 
                  outboard, the design is superb. Very simple to build, no strongback 
                  required, and good looking!  
                  
                Doug’s Squark design has proved to be a great success. 
                  She may only be eight feet long, but she paddles and tracks 
                  very nicely using a normal kayak double-paddle. Interest in 
                  her has been strong, because people like the idea of a pretty 
                  little open boat that can be carried in one hand and put in 
                  the back of a station wagon, hatch-back or ute.  
                Anyway, there is work to be done, so I’ll sign off. 
                Mike Rowe “ 
                
               
               
  |