Certain jobs will involve removing existing lines on asphalt or cement parking lots or roads. There are two methods for doing this. One is the cover up method and the other is the removal method.
Covering up stripes simply involves matching some paint to the color of the surrounding asphalt or cement and then spraying the stripe. A couple of coats will assure that the stripes stay invisible for longer.
The second method involves completely removing the line. This is done with a grinder or scarifier. These machines simply grind the stripe down to the original asphalt or cement. They are adjustable so you can keep from going too deep into the surface. The video below shows one being used. We also have additional information on these machines at infozing.com/concrete .