you do realize those are 3 independent stone mini demos?
As mentioned in the post above I believe that one has to erase the scratches made by the previous stone before moving on to the next. This would be the case thruout the entire setup. As a beginner in this field I only can imagine what the right procedure is, but for me this 3 stone setup seems like too little - or mis-matched. Wouldn't it be better to use like a 5-6 stone setup and then be sure that all scratches would be erased properly = a perfect polish? If it would, which stones would you recommend in such setup?