Pressure washing can effectively remove rust stains from vinyl siding. However, power washing can provide faster results. Hot water, combined with at least 2,000 PSI, will quickly loosen up the rust stains that have accumulated on your siding. Spray at a direct angle to prevent water from going inside the vinyl siding and causing water damage.
Pressure washing stucco surfaces will require a delicate touch to avoid damage. First, use low-pressure water to saturate the surface. Apply a rust remover to the affected areas and let the solution sit for 5-10 minutes. Use a rotating scrub brush to loosen the rust stains. After, use a pressure washer to rinse the surface. Remember to only use 1,500 to 2,500 PSI and clean from top to bottom. Make sure the wand is 2 to 2 ½ feet away.
To clean rust stains from tile and grout, apply a lemon juice-and-borax solution to the surface. Allow to sit for 5 to 10 minutes. Then, use a pressure washer to clean the surface. A low PSI of about 800 to 1,200 is enough to effectively clean tiles without causing any damage.
Pressure washing can remove rust stains from wood but you need to proceed with caution to prevent damage. Use 500 to 600 PSI for softwoods and a maximum of 1,200 PSI for harder woods. Keep a uniform, 12-inch distance from the surface, and start cleaning from the outside going in.