3M™ Dry Guide Coat Cartridge is a dry powder with applicator used to highlight surface imperfections and sand scratches prior to finishing with abrasives. When sanding polyester filler, it ensures the filler is flat with no ripples and that the body styling lines and contours are straight and correct. It also ensures the total primed area is sanded prior to top coating. It requires no masking and there is no dry time involved. It can also be used for both wet and dry sanding and contains no solvents. A method for identifying surface imperfections such as pinholes and deep scratches in primer. Requires no masking and there is no dry time involved. Can be used for both wet and dry sanding. Contains no solvents.