We bought a new manufactured home. All the walls are white vinyl covered sheetrock. How do I prep this for paint? Please respond to jm6602@aol.com. That's easy for me to find.

My husband and I just embarked on the task of repainting our first home. We are dealing with plaster walls and shiny, outdated woodwork. We started with the master bedroom which we painted a darker green colour, and were painting over all the woodwork in a daisy white colour. The overall effect is very nice, but there are a couple of things that have had trouble with: 1. There is a colour variation between where I "cut" around the walls around the ceiling and edges and where my husband used the roller. Why? The edges look bluer than the rest of the walls. 2. After doing the walls, we taped everything off to do the trim. After applying 3 coats of the latex semigloss, we started to remove the tape, and found that it was pulling up lots of the fresh trim paint with it, not to mention ripping into strips so small that we had to use tweezers to get it off. What did we do wrong? Is it easier to do it freehand?