First, I am in the lawncare business, and while I have studied sufficiently to pass the applicators exam in Louisiana, I do not wish to assume the liability associated with application at this time. That said, a client asked for a recommendation on chemicals that they could legally purchase and apply to eliminate weeds from a gravel parking area. I told them that I had no experience in this area, but I would ask the professionals. Any suggestions? Yes, I know that calling a professional applicator is the best option. Told them so. I would still like to answer the direct question. Your help is appreciated.