Restored these pavers today with our F9 Hard Water Stain Remover. This will be available this summer. Then we went on to another job with oil and battery stains. For this we used EBC, pressure washed, then followed up with F9 BARC Rust Remover. Needless to say both customers were impressed and very satisfied! We use our Sirocco for water recovery when using our Hard Water Stain Remover so nothing goes down the storm drains.