This 3M soft edge foam masking tape helps to eliminate the hard edge that would come from using regular masking tape. A hard edge is one that you can feel after the paint job is done. We used it for the door jambs and between the hood and the fenders. Also note how we back-taped the doors. The green tape is a bit more expensive than the blue tape, but the guys at Reno Auto assured us that it's worth it. It sticks better than the blue tape, and they tell us even after a few days in the sun it will come off just like it would the day it was applied.