I am sealing the driveways for a small neighborhood and a few of them have rust from fertilizer on them I am removing first. My question is what steps do I need to take or is there anything special I need to do with the F9 before I seal the concrete...I've tried contacting Craig for 3 days with no luck so didn't know if you all had any experience with it.

Travis Stevens
Elegant Exterior
"We love to Squirt"