This is especially helpful when changing paint colors. Simple remove the old foil and replace it with a fresh sheet when applying a new color. Why spend time washing paint trays when you don’t have to?
Simply wrap them in plastic wrap until you have the time. The plastic wrap will keep the brushes and rollers from drying out, allowing you to wash them when your schedule permits. This method works well for brushes and rollers while you're waiting for paint to dry between coats.