More or less. When you wet sand or buff a single stage metallic you can easily remove the top layer of paint, which is usually where the paint usually gets that metallic look from. So you end up with blotches of slightly different looking paint.
Thanks for that explanation. Now i understand the issue. I painted around the windshield frame and surround with single before installing glass. I'm going to do a little experimenting with sand/buff as these areas will get repainted anyway. So i can see exactly what MY paint will do.