[Chris Haynes]

After flushing my cooling system I filled it with RUST 911. I drover the car a few miles and let it sit for a day. Upon draining it I got chunks of rust and the water had turned black. Refilled with RUST 911 and drove the car some more and let sit for a day again. Drained and the water was now gray and no more chunks. Repeated the procedure again and this time the water drained clear. The inside of the radiator was clean. I pulled the water inlet and outlet and inspected the water passages. They were clean, bare metal gray in color. I flushed the system and filled it with Evans Waterless Coolant. My thought is no water, No rust.