An art mural is a popular community art display that can brighten up any area. Time and harsh weather are frequent causes of paint chipping. There are a few measures that can be taken to prevent chips, namely protective coating. Some coating compounds are not chemically compatible with some paints and can cause discoloration, so it is advised to check the manufacturer's specifications first.
Some mural painters coat their finished murals with a clear wax compound that not only protects the paint from chipping, it also allows easy clean-up of dirt or even graffiti. This wax coating needs to be applied as thin as possible to avoid the paint colors from looking cloudy, so it is recommended that the DIY painter practice applying it on some scrap material first.
Another alternative to protect mural art from chips is to apply a clear polyurethane coating, available in most paint departments. Many of these chemicals only work with certain paint types, mainly acrylic-based paints. Some polyurethane compounds are advertised as anti-graffiti, though some of these have been found to cause yellowing in white or other light paint colors. It is a good idea to keep this in mind if you decide to select this method to protect your mural.