Designed for hand sanding, each 9 x 11 inch sheet can be cut to the size of your sanding block. During Stage 4 of the 3M Body Repair System use 400 grit sandpaper to refine 320 grit scratches in primer. Follow this step by sanding with 600 grit sandpaper to refine 400 grit scratches prior to applying base coat paint.

Product Details:

• 400 grit sandpaper used to refine 320 scratches in primer
• Can be used wet or dry
• Contains 5 sheets of 9 X 11 inch sandpaper
• Use during Stage 4 of the 3M Body Repair System