JohnN,
Each step of abrasive adds length, as opposed to 500, skip to 4000 etc, so if you start at 1000, as an example, use every grit up to 4000, then you can even try some compound (abrasives) before you finish with a polish that has slip agents to also create length.
The potential downside to extreme polish and length is the over/under you can create on the lanes, but if you're bowling on the desert...