I agree with charlest above. My experience is the more steps you sand (in between the 500 and 4000) the more you eliminate the "peaks and valleys" created by the 500 grit. This will create more length and less overall hook. The ball's ability to displace oil quickly is also hindered to some extent.
There are some other factors affecting reaction that will include how much time spent on each step, amount of hand pressure, spinner speed, water usage, etc. There are no absolute rules because we all bowl on varying lane surfaces with different oil patterns, too. What one may consider "heavy oil" is medium for the next guy, and so on.
Have you ever bowled on the scorched condition where your weakest cover ball seems to outperform your more aggressive equipment?
Just learn what works best for your own game and conditions. I might suggest taking a few notes as you go along so when you find that great combination your chances of repeating it are better.
Lane Carter, Strike Zone Pro Shops - Salt Lake City, Utah
Brunswick Pro Shop Staff
The opinions expressed are solely those of the writer and not of Brunswick Corporation.