The factory surfaces are done with abralon now, nothing to convert.

You can see the finishing guide here:
http://www.motivbowling.com/resources/factory-finish-guide.html

or use my Bowlers grit chart from here (which includes the motiv chart),

http://home.earthlink.net/~litefrozen/downloads/bowling_grit_chart_v2.pdf
This is a grit converstion chart for all different types of surface modifying products from pads to polishes.

There are seven pages:
1- The Grit Comparison Chart
2- Grit lists for different products
3- Storms Old and New resurfacing steps, Motiv Factory Finishes
4- Radicals ball surface chart, Mo Pinels Skip a Grit and Some Useful Grit Combos.
5- The Bowling Ball Surface Adjustment Table by jbungard
6- The Ball Surface Friction Calculator (Outdated)
7- The Six sides of a bowling ball chart

Thank you, that makes much more sense