Another option is to wet sand with a drywall sponge. You can use a sponge for dry sanding, too, but they usually perform best wet. Sponges generally have different faces with different grits, so you’ll start from a medium face and then take another pass with a finer grit face.
Wet sanding is great for smaller projects and especially useful for corners and tight spaces since it’s easier to get the sponge into those areas than other sanding tools. Wet sanding also produces less mess since the water prevents drywall dust from flying off the wall as much. Rinse your sponge frequently as you work for the best results.
Sanding sponges don’t always have grits numbers like sandpaper but the same principles apply – stick to medium and fine. Very coarse sponges can leave marks and superfine sponges may take too long or be unable to remove joint compound at all.
Best Grit Sandpaper Sponge for Drywall: medium for a first pass and fine for a second pass
The most critical part of finishing a piece of furniture happens before you open a can of stain or paint - it starts with the sanding. Sanding is critical to creating a smooth surface. Use the following sanding sequences for new wood:
For wood that is going to be painted, use 120-grit, followed by 150-grit.
For wood that will be clear-coated with a water-based topcoat, use 120-grit, followed by 150 or 220-grit.
For wood that will be clear-coated with an oil-based topcoat, sand up to 150-grit.
Do not over sand with the final grits. You will create a surface that is so smooth it will not accept a finish.
Instructional Video: How to Prep Sand New or Raw Wood