Power Washing
Power washing or pressure washing is the use of high-pressure water spray to remove loose paint, mold, grime, dust, mud, chewing gum and dirt from surfaces and objects such as buildings, vehicles and concrete surfaces. Machines can produce pressures from 750 to 30,000 psi.
We only recommend this method if the surface is so dirty that soft washing, and a good scrub will not work, and it is going to be sealed, stained, or painted after.