So I had a white Ford Fusion in pearl white today. It had major road grime embedded in the paint everywhere but the client was set on a AIO(because of wanting little to no abrasives and price). After claying with meguiar's white clay I noticed a little marring where excessive claying was necessary to remove "rust dots" and what seemed to be tar or rubber(little spots all down side of car and a few on hood). While the car was pretty badly swirled it was hidden by the pearl unless looking at it perfectly, and se with the marring. What can I do in the future to quickly and SAFELY remove this without marring for people who do not want abrasives or simply cannot afford them? I don't have pics of the marring as I inly noticed it in perfect lighting conditions just before the client picked the car up but I do have a pick of some of the grime.