DIY MARBLE PRINT Mod Podge Nail Varnish Instructions: Pour a couple of inches of water into a container First pour clear nail varnish into the water. You might want to practice a couple of times with some scrap fabric or paper. Drizzle the white nail varnish over the clear and use a stick to marble the varnish. You have to work fast because it dries pretty quickly! 5. Dip the trainer fabric into the water over the varnish.