Bio-Blue Hull Surface Prep 92 is a powerful blend of cleaning agents and silica grit that de-waxes, etches, cleans, and prepares bare fiberglass for painting. Regardless of the boat's age, the initial surface preparation is imperative. Residual parting agents utilized by the boat manufacturer to "pop" the boat from the mold may still be present, although not visibly apparent. This solvent-free product is designed to provide an easy and trouble-free method of removing unwanted contaminants, grease, wax, dirt, and mold release agents from fiberglass surfaces prior to painting. When used in conjunction with 6998 Skip Sand Primer or 6999 Sandless Primer and antifouling paint, it is part of an easy 1-2-3 system of bottom painting.