PPS™ Sun Gun™ Diffuser by 3M®. 3M™ PPS™ SUN GUN™ II Accessories are components and replacement parts for the 3M™ PPS™ SUN GUN™ II, a device used to provide a light source that replicates natural sunlight. This tool allows technicians to better match paint colors, identify pre-painting defects such as pin holes and scratches and locate post-painting defects such as swirls marks, burn through, sand scratches and dirt nibs. Their 3M-approved accessories maintain optimal performance standards of the 3M™ PPS™ SUN GUN™ II. This tool offers the following benefits to technicians or users attempting to match automotive or industrial paint colors.