Revisiting this thread about how to finish a wood exterior without fiberglassing or glue-and-paint canvas. I had asked about just priming and painting the exterior with a good quality exterior house paint, but there were cautions about it letting the wood get wet.
I recently ran across a building thread for a plywood caravan on an Aussie vintage van forum. The poster wrote:
The next picture is just after the first coat of a waterproofing membrane. This product I thought was the best to use as after you prime the van you apply this thick paint-like colour. The manufacture's say it will waterproof ply and also has UV protection. I applied it with a roller and once dry it was fairly easy to rub back. I removed all the bits to seal all the joints and ends of exposed ply ( for extra protection). To do the van I used approx 2 litres per coat. In the past bitumum paint was used with a layer of canvas over the top. When I got the product I made a ply box and painted it inside and filled it with water.
That was three days ago and it still has not leaked so I think it will do for my van. Thought I would post a little picture so it downloads quicker.Here's the pic:
http://vintagecaravans.proboards.com/th ... llTo=10180So what do you suppose he means by a waterproof membrane that gets painted on with a roller? Would it be something like the elastomeric roof coating (i.e., Kool Seal) some people put on their trailers? He later painted two "top coats" on the exterior, which I take to mean regular paint. Here's a pic after painting. (I note the little wood "drip caps" look very neat.)
http://vintagecaravans.proboards.com/post/10189/threadSo what kind of paint-on membrane would protect a plywood exterior, and what kind of paint would go over it? Anyone?