3M Finesse-it PSA Film Disc Roll 466LA is 3M’s original microreplicated film disc frequently imitated, this technology helps remove surface imperfections from clearcoats, all without changing the surface topography.3M Finesse-it PSA Film Disc Roll 466LA engineered by incorporating silicon carbide mineral into a matrix of repeating microstructures, and the film backing minimizes the chance for surface abnormalities. The micro-structured silicon carbide mineral cuts sharply enough to quickly remove imperfections, but not so much so that you risk gouging or marring the surface. It is commonly used for defect repair on clear coats, paint and plastics, because it can effectively refine these surfaces without significantly gouging or damaging the workpiece. Available in three grades -- A3, A5 and A7, 3M Finesse-it PSA Film Disc Roll 466LA has been the clearcoat spot repair disc most used by automotive manufacturers worldwide. It can be used for both manual and automated processes.