Just to add to Stans comment, a drop or two of dishwash liquid in your water helps the paper glide too./<\\/p>[]<\\/p>/Quote from stan on July 3, 2014, 19:21
I have found when you wet sand, keep the water clean and constantly dip the paper - otherwise you end up with larger particles embedding in the paper and they leave scratches. Also watch the stray edges, they cause scratches outside your sanding area
Same goes for dry sanding, and it is even more pronounced