Can paint be used again after about 3 years if the can is stored inside the house and had never been open. I have already done some painting with new paint. When I take off the painter's tape, some new paint on the wall peels off with the tape. How can I avoid peeling the new paint? How much paint should I used on the roller and how can I control the amount of paint on the roller? I found the roller did not move on the paint tray but I can move it on the wall. I got some spot too much paint and some quite thin. Is it worthwhile to clean the roller for the next painting? After cleaning and drying, my roller feel quite stiff to use. Is it necessary to sand the glossy old paint rough before putting on the new coating?