Next, he covered the hood liberally with solution. There's no maximum amount sprayed; in this case, more is better. The idea behind using the spray is not only to keep the area lubricated but also to prevent the paper from loading up with paint material and clearcoat. Be sure to sand in the direction of the panel. A hazy color appeared as sanding began and the clearcoat began to wash in with the water. It's OK, it showed that the sanding was working and the very top layers of clearcoat were lifting.