Pressure Washing and Cabinet Refinishing by JCE Painting You may want to pressure wash your exteriors for many reasons. Renovation can be one of the main reasons, and pressure washing is a wise decision that will save you from a headache later. Because during painting, it will be easier without those annoying peeling layers of old paints, or other molds or mildews found on the exterior parts. Talking about molds and mildews, they can be quite destructive for your home itself. If you have allergies whose source is still a mystery to you, molds and mildews can be the culprit behind your health issues like allergies, and pressure washing is the easiest way to get rid of them.