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The absolute best treatment for marine ply to keep out water etc is a brush applied epoxy resin. Look at W.E.S.T system expoy resins. Designed for boat building. it turns wood into a plastic like state which will totally proof it against every thing except UV light. To proof against this then just paint after application.

F

www.westsystem.com

Try that. Not cheap but the best.

I used Schultz to proof the base of our old Raclet TT but if I was doing the same again, I would be looking more towards Waxoil.

The main difference is that Schultz chips from road stones and will need redoing every few years whereas Waxoil "creeps" and any damaged pinholes will fill in over time.

Both of these applications would be put on using my compressor.

Quote: Originally posted by ferrodo on 13/8/2012

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www.westsystem.com

Try that. Not cheap but the best.

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The west SYTEM TYPE epoxies are very thin and designed to soak into wood where as normal fibre gkass resins are thicker and designed to be used with glass fibre matting.

F

don't use hammerite otherwise you'll doing it again soon.

i can recommend the following stuff (used on my vw camper):

http://www.bilthamber.com/paints-and-coatings/electrox

if you've got cavities on the chassis (maybe not if they're just plain old steel girders) use this inside:

http://www.bilthamber.com/cavity-waxes/dynax-s50

i don't work for this company but their stuff is good.  i took the view it may not be the cheapest but i didn't want to do it all again for a very long time and so far the results are excellent.

this stuff comes highly recommended by classic car owners etc - do a google search and you'll find plenty of comments.

i reckon the marine ply will be fine with any sort of outdoor timber treatment - the stuff designed for fence posts that sinks in deep (not a surface type paint/treatment).  as long as the ply isn't pemanently wet, and as its marine, this should be fine.

hope this helps