Paint Sander Projects: Determining the Proper Sandpaper Grade

What You'll Need
Portable paint sander
Utility knife
Various grades of sandpaper
Eye goggles
Filtering face mask

Sandpaper for your paint sander comes in a wide range of grades, or grits, for various tasks. Read below on how to determine the proper sandpaper grade for your paint sanding project.

Step 1: Investigate How Much Paint is On Surfaces

If you live in a 1950s or earlier dwelling, your walls could carry up to 10 layers of paint. Cut down through the paint to the wall surface at an inconspicuous location near a door jamb to find out how much paint you will have to remove.

Step 2: Remove Multiple Paint Layers

Affix a sheet of the coarsest sandpaper, 60 to 80 grit, to your paint sander to get through the layers.

Step 3: Remove Paint Lumps

Choose a medium sandpaper, 120-150 grit, once you are down to the drywall, plaster or wood wall surface to remove paint lumps and other surface irregularities.

Step 4: Fine Sanding to Smooth Off Surface

Attach a fine-grit sandpaper, 200 to 300 grit, to the paint sander to bring the wall surface to a smooth finish, ready for primer.

Step 5: Safety Tips

Always wear eye goggles and a filtering face mask when sanding. Old paints can contain lead, a source of lung problems even from limited exposure.