There are a few things one can do when running on non-porous substrates. Try adding hydrogen peroxide to your fountain solution. This temporarily increases the oxygen level in the fountain solution, stimulating drying by oxidation. About eight ounces to twenty gallons seems to be enough, the problem is you have to add it at regular intervals as it is unstable. Every hour seems to work.
Another old trick, put a few drops of water on the substrate. If the water beads up like water on a freshly waxed car, things should go smoothly. If the water spreads out, effectively wetting the surface, call in sick until that job is out of the plant. I learned this back in the sixties from the old timers when we were printing on acetate sheets. All of the pallets of acetate looked the same, but the old guys would segregate the pallets with the wrong surface energy and trick us youngsters into running them.
Daniel T Roll