A segment on the basics of sanding. The first thing I’ll mention here is that you don’t want to be sanding All Purpose Mud, it has a glue base in it which creates a very hard product. You should be using topping for anything between taping and texturing. The better you get at coating, the less sanding you’ll have to do. Typically we’ll use 80 or 100 grit paper for the rough coat sanding and 120 or 150 grit paper for our fine sanding. One thing to watch out for is sanding too far into the layer of drywall paper on the surface and roughing it up so to speak. Another time saving step while coating is to make sure that you don’t leave build up on the edges of your seams, you can wipe those edges smooth so they blend right into the sheetrock. A drywall sanding sponge is a very handy thing to have when you need to blend your mud line into an existing texture. Lastly, always use a mask when sanding, it will pay off in the long run.