I rent a fairly new duplex and I'm moving out soon. I noticed the builder's grade paint scuffs REALLY easily so I used a Magic Eraser to get rid of the marks. The problem is, there are spots where the paint was so thin, it came right off. How do I touch it up? There are hundreds of different whites to choose from let alone different finishes. Do I ask for "Builder's grade" paint? Is there such a thing or is it all about the poor application?? Help!!!!!