material to a measure of 100 by weight of polyester resin there is added 1 mek peroxide catalyst and 10 by weight in the same relative proportion of a dry fluorescent oil soluble powder color dye or pigment which is suitable for fluorescent activation such fluorescent pigments capable of being cast in a polymer gel are available from several sources including rosco iddings dry pigments 36 busch avenue port chester new york 10573 which markets such colorants as a 34 fluorescent 34 powder color these proportions are not critical and may be modified by those experienced in color polymer gel casting it is noted that the pigment also serves as a filler for the polyester gel an improvement in stabilizing the longevity of the color fastness of the gel is achieved by the use of a dry fluorescent color with a uv inhibitor in a mixture of uv protected polyester resin a fluorescent powder color will not dissolve in the gel mixture but will break up into molecules or other minute particles suspended in the polyester and each molecule or particle in the mixture will be coated with a layer of uv protected resin this resin is so prepared and is then applied as a gel to the cut out opening in the mat or sheet layer 14 that is applied over the sequentially stenciled areas of the panel the gel is allowed to cure upon curing the sheet or mat layer 14 need not be removed fig4 shows a more realistically proportioned cross section of.