Just remember....smooth is okay, but it is most important that it is straight!

The two part primers will fill most of the sand scratches as you go through to process of guide coating, blocking the primer, and glazing any imperfections that remain.

Beginners tend to "oversand" filler, to make the edges pretty. When they finally paint, they discover that they can see a slightly depressed shape called a "repair ring". At this point, you have created the need to spot repair the paint, and that never is quite as good as the original finish.