Here's a closer look at mine. I did a small section to show what I thought you were talking about, but it sounds like you have something totally different. Maybe this will help others. All sanding is done wet.
My apologies for the mediocre photography, one of my many weaknesses. Also, because of the light and close up pics, scratches look horrible, but paint will hide most things after 600 grit sanding, unless you are one of those masters that can lay down a micron or two layer of paint.