Hey Alan,
I have used Klenztone twice, only in small test patches. Once on my driveway and once at an out of business gas station w/ gas pumps. I must say the product worked very well. I just poured a small amount out of the bottle, worked it in w/ wire brush, and let it sit. No pressure washing, no rinsing. When I came back several hours later, the stain was noticably brighter. It is very pricey in my opinion. 1gallon/$21.45 - Case(4-1gallon bottles)/83.00 - 5gallon pale/$96.00. Here`s the problem I`m running into. I do some drive thru pads that are pretty bad. And to do the entire pad (intercom to pick up window), it would cost me a fortune! So I`m thinking of just doing the heavily soiled areas. Right in front of the intercom and right at the pick up window. Here`s what I haven`t figured out yet. I need to clean the entire pad, gum must come up. And the rep recommends that you apply to a dry surface. So, I guess I need to clean the entire pad first, let dry and when I`m finished w/ everything else, apply Klenztone and take off. If anybody has any other ideas, I`m all ears. Bottom line, if it was a little less expensive, I`d use it in a heart beat.