you need a can of HOK's marblizer. You typically spray it over a dark base color, then use saran wrap to get the marblized effect. You then need to clear over the marblizer with HOK SG100 (intercoat clear). Here's a tip: remove your tapeouts, and when you spray the SG100, do the entire piece. That helps reduce sharp edges on your tape lines. Then clear over the entire part with your topcoat clear to really smooth it out.