Painted rocks became a popular craft for centuries. More recently, this art activity has seen a resurgence in popularity. Rock is the basis of art that are easily accessible and affordable for most people when the budget is free, in many cases. Artfully changed the stone using a number of media; acrylic paints including the most popular. You can paint with a brush cheap. Depending on the hardness or softness of the stone, brush the surface will wear down quickly, making brush costly waste. They are generally inexpensive and works well when painting on a rock.