If you do not clean up to start with, you will be sanding the oils and Grime in to the area. When the paint dries these parts will never adhere. Think of paint similar to a mild glue. I'd personally grab a orbit sander with 80 grit, sand those who http://cabinetspaintedlacquerwhi05206.blogzag.com/40113046/details-fiction-and-cabinet-paint-kits