Wand marks like these can be avoided by using the appropriate nozzle for the job, such as a 40-degree fan tip. Washers should also maintain a consistent distance from the surface they are working on of at least 12 inches. A contractor should make sure each pass with the wand overlaps the previous pass and avoid holding the tip in one place for too long. The wand should be angled to prevent pushing the dirt deeper.

 

Our tech support department suggested the contractor first clean the entire surface with either Cleansol BC or Heritage Restorer. They then recommended the contractor head over to the Learning Center on our website and consult the White Deposit Issues page, which shows how to identify the different types of white deposits and what products should be tested in each case.