FYI, I emailed Sonax asking them why low speed with good pressure, then increase speed with less pressure. I usually do the opposite as far as machine speed. Here's the answer I got....
There’s definitely a couple different trains of thought on this. The theory with the low speed, heavier pressure in the first 10 seconds of the cycle keeps the abrasive material intact and “sharper” longer before breaking down and diminishing. If there is high rotational speed immediately the heat build up will break the abrasive down quicker and less up front cutting is happening. So with the lower speed and heavy pressure you’re in effect getting more bite out of the liquid material (polish) then with increased speed the jeweling effect kicks in as the abrasive powder breaks down.
Hope this makes sense but that’s the theory behind it anyway.
Jason