Q. Is sandpaper harmful?

Tiny particles released by titanium dioxide sandpaper are a recognized carcinogen if breathed while Formaldehyde resins used in aluminum oxide paper can potentially harm the lungs and lead to fibrosis which manifests itself in coughing shortness of breath and diminished lung capacity if inhaled. Obviously if a store does a few of things all of these risks can be eliminated. Put on the proper footwear as well as safety glasses goggles or a faceshield to prevent injury. Wear earplugs rated for the decibel level in. Run sanders with the ventilation system turned on. When sanding or cleaning up be sure to protect the lungs.