3M™ SandBlaster™ Pro Dual Angle Sanding Sponge is ideal for preparing freshly coated surfaces (wood, metal,) prior to the next coat.
3M™ SandBlaster™ Pro Ultra Flexible Sanding Sponge is best used on paint, wood, metal and drywall. Use the pattern side for detail sanding and superior conformability. The regular side is best used for flat surface sanding.