Hey guys, just a few questions. I have a customer with a crushed rock driveway that has some broadleaf and grassy weeds growing up in certain areas. I have yet to go see him for a formal quote yet, but am going to offer two options. The first would be just a one-time kill with Round-Up Quik Pro, with which I have great results. The second would be Quik-Pro mixed with some type of sterilant to keep them from coming back. Questions: 1. Is a mixture like this possible? 2. What do you guys recommend for a sterilant? (There is no desirable vegetation nearby, just some nuisance brush.) 3. How long should I expect "sterilization" out of whatever sterilant you recommend? 4. What type of nozzle is best for this? Would it be a "spray until ground is wet application"? Any input appreciated! Thanks!