I can not answer your question directly, but I know others are always trying to improve their prep process, including me. I would assume that also includes John. Everyone always wants to be faster. At some point, speed gains are going to be harder to come by. To quantify how much faster you will be with the new Black Ice system is difficult to determine. The only real answer is to try it. Most of my recent speed gains, however, have been from being evermore meticulous about what I am doing and when a process (e.g. polishing a bore) is complete. The new formula may be something that will help you improve. It is one of many PWD enigmas...
Well my cars have been out the door since Friday, so I'm pretty locked in. I didn't even realize there was a 4 polish system until Monday, but that's ok...Just my opinion, but I doubt you will find any speed difference in any of the kits John has put out. Your Speed gains are going to depend on how well you perfect the system. I've been using the original kit for over a year now. Stick with what you have & get to it!
It is only thousandths. Stick with what you have and you will be fine.So, I've got "the older" three polish system, what kind of performance will the newer system have by comparison? Would I gain a hundredth or more?