Amazon.com: Proje Throwback Clay Lube Ultra Slick Clay Bar Lubricant Reduces Friction Synthetic Water Based Formula for Clay Bar Clay Mitts Clay Towels and Clay Discs Decontamination Spray Claying while washing may save time, but here's why I don't recommend it: When you're washing a vehicle, you don't know yet how hard or soft the paint is. How hard or The only time I would recommend using soap as a Clay lubricant is if you are using the clay bar one time and not reusing it later. @jesseaqu What Lubricant Should You Use With a Clay Bar? DriveDetailed