I have done enough interior/exterior painting to have a general idea of what I am doing, but I have a couple of questions? When you are painting an interior wall and you are 'cutting in' at the ceiling, do you: (a) use the brush vertically and paint from the ceiling downward or (b) use the brush horizontally....? And in General do you: Clean your roller covers? Or just replace them? Use masking tape or no? ANy "hot tips" you may have would be great too! When I paint I generally: 1. Sand and wash surfaces 2. Paint the ceiling 3. Paint the trim 4. Cut in walls with brush 5. Roll out walls (for walls, I prime once and paint twice) Also: Do you wait for the 'cutting in' of walls to dry completely before rolling the rest of the wall out? Or do you cut a section in and roll it and then repeat? The former is the way I do it. Thanks!!