This was used on the GIP field from PSP Galveston. The last time they were washed Thoroughly was 1 March. I am waiting for a gallon of this stuff to come in. I used a 16 oz sample and did a third of the field. All field owners should buy this solution. For the price, and the time that it cuts on cleaning your field this guy has a new customer with Galveston Island Paintball.