<human>:  What is the proper way to paint a wall?
<bot>: The proper way to paint a wall is to start by preparing the surface by cleaning it and making any necessary repairs. Next, apply primer and patching materials as needed. Once the surface is prepared, use a roller or brush to paint the wall evenly. When applying more than one coat, be sure to allow the paint to dry in between coats. Finally, make sure to clean up any spill or splatter when you’re done.