14. How to prevent paint cans from developing a film layer Tightly close the paint can’s lid and turn the jar upside down for a few seconds to stop a film from forming. This little tip will contribute to the can’s internal impermeability. Post navigation 12 Things That Can Protect Your Home While You’re Away 9 Things That We Wash Too Often, and 9 More That We Usually Forget About 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16