Honestly to get close to the same surface, use a old 4000 pad with water and you will be close to the sheen that is given with the compound. 

Thanks guys.  So, in this case would you typically go about 20-30 seconds on 4 sides with the 500 at medium pressure, and then hit it with the used 4000 w/water also on 4 sides at light pressure for about 10-20 seconds?  Not sure about how long to use the 4000 in this case.  Normally for some of my own equipment, I use 500 for 20 secs at medium pressure on 4 sides, then 4000 very very lightly for 10 seconds on two sides.

Personally I like the lower grit for shorter time. I do 500 4 sides light pressure for 10 seconds and do wet 4000 for 15-20 seconds medium pressure