... transparent, neutral or weak acid organic resins like polyurethane resin, acrylic acid resin, epoxy resin, polyester resin, etc.. b. For painting purposes, particle size ... of luminous pigment, measured by weight, to the clear resin. This is just a guideline. You could add more ... prevent moisture in the manufacturing process. A yellowing of resin may indicate moisture. Apply a final clear overcoat to ...