He must have really good vacuums on those sanders. You weren't misled, they are usually pretty messy. Not NEAR as messy as drywall sanding though ... unless the people putting it on are REALLY good so there isn't much to sand. A REALLY good taper doesn't even need sandpaper, uses a large sponge.Cannot believe that I was so concerned about the dust everyone else said would be so bad. There isn't enough here to make a spit balls worth of difference.