thanks folks for the info
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Tigris99 wrote:If your going over luan your way over thinking it.
Good exterior house paint. Use it to glue canvas down and all.
I did a test run before skinning my trailer and peeling the canvas off means taking wood off with it. No need for fancy ways of adhering canvas to luan. Only creating more work, cost, and possible problems vs just 5 gallon bucket of exterior paint.
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And ive read that using the "mix" on luan actually causes delamination because of the glue used in it.
Tigris99 wrote:Standard luan cant handle the solvents in the mix. It breaks it down about as fast as water will.
That's why birch plywood or at the least, final letter being "X" on plywood for exterior is the minimum. First the outer layer is thicker and the glue is meant to resist water and solvents. Luan is meant to be cheap underlayment, cabinet sides, things like that. Stuff with nothing more than adhesive or paint coating it. Nothing thats meant to penetrate.
I did test mineral spirits poured on luan yesturday (have scraps around still) and sure as sh**, delaminated the 4" wide piece. Since thats 50% of the mix i would say avoid that.
Oil based paint, stain, varnish (within reason, dont try to see how much it will soak up), urathane is ok as it doesn't penetrate deeply.
Luan being done with oil based paints, urethane, stuff like that which created a hard, waterproof shell is common and ok as long as you seal seams. Been a few ive found that have done that without issues. Tb2 or 3 in the seams is a great way to seal those the seams so the varnish and such dont get in. Just allow it to cure, sand off access from the face and done.
I went exterior paint/pmf for lack of maintenance required and durability against my kids and me leaning stuff against the trailer. The ones that are painted and urethaned though that ive seen are really gorgeous looking. Like the looks better than aluminum or obviously PMF.
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