Start smoothing the surface by sanding with 100 grit sandpaper, 120 grit drywall sanding screen or a Medium grit sanding sponge. We recommend using an Extra Large Sanding Sponge. This oversized sponge is made for ease of sanding large drywall surfaces.
Secondly, can I use an electric sander on drywall?
An electric drywall sander was made specifically for large and hard-to-reach drywall sanding projects. If you have a lot of work and high areas, an electric drywall sander is best. … This tool also comes with a “skirt” around the sanding disc, which reduces the risk of gouging and enhances dust removal.