There are six different sandpapers. The first one is the hardest and most scratchy. it does not smooth it but it does sand away big bumps and makes way for the next one. They get softer and softer until you are at the last one, which is the most softest. you have to work a long time for that one. But now we have two sanding machines to do it. The problem is, we only have the hardest sandpaper for them. That means we have to do the rest by hand. My Mom is going to buy them. we took the sandpaper down to Whiskeytown lake. we made some there without the machines.