Bed Wood Question

[Praxiss454]

Hi all,

I have the green light from the boss to buy a Mar-K bed wood kit for my 65 GMC, including hardware and stuff. I plan to do the 3 coats of POR-15 and then 3 coats of black paint as recommended by Mar-K's tests.

My question: If I buy the bed wood now, and paint it right away, but don't install it right away, is it going to warp on me? I want to do some clean up before mounting everything, but that clean up might take me a month or two of weekends to finish up.

Second question: If instead of the Mar-K kit, I buy Kiln Dried wood from a local lumber yard and cut it myself, will *that* wood warp on me?

My only experience so far has been to try some sample dado cuts on a piece of home depot common board, and that warped to crap after a few weeks. Since I'm going to be painting the wood black, I don't need an ultra high quality wood, but I just don't want to deal w/ warping issues.