Primarily the acrylic backer. I'm afraid that if I mount acrylic track directly to the wood , expansion/ contraction will effect mounting.The acrylic track turns hazy, the clear acrylic backer turns hazy, or both?
That's dumb... I should have thought of that. I was sitting here imagining hogging out .25" aluminum for custom track, never occurred to me to stack materials. Long day ahead I guess.I've done wood tracks before for a menu board. It was just a strip of 1/4 ply with another strip wider than it glued and brad nailed to it.