3M offers many options for scuff sanding the sealer coat prior to applying the final topcoat utilizing a Random Orbital Sander for processing parts that have a sealer coat applied.
Sealer sanding is recommended to scuff prior to applying the topcoat. This levels the surface and provides mechanical adhesion properties.
Please note that all processes recommended on our website are an excellent starting point for rapidly achieving good finish results. However every application is unique so please contact 3M Technical Support at 1-888-745-4324 to discuss your specific application.
Sealer sand (scuff sand) your workpiece using an aluminum oxide abrasive in grades P320 or P400.