Water slide paper is a thin film on an adhesive sheet of paper. Soaking it in water allows it to slide off to where you want to attach it. Clear coat certainly helps it hold up better. Same thing as model waterslides for our kid days, except those were inks screen printed on the paper, encapsulated in clear. The inkjet or ALPS version requires the film to print on, and to be hand cut to shape. Here's some I printed yesterday, on white, so they have to be cut to the edge of the color before applying. I sprayed with 3 coats of clear enamel so far.