Wet with no app might be ok if it's not precut. Sure I'd float a big peice on there, squeegee it out and lay fine line down to trim. Just wrap your squeegee with a peice of a t shirt or a good paper towel so you dont scratch the surface.If its plotter cut, I'd rather have the tape on it. I'd put it on, squeegee it real nice, then soak the app tape and let the water loosen up the app tape adhesive so it peels off nice and easy.