Someone gave me a 14 lb. Columbia300 World Beater. It is a ball for my daughter. It is a little beat up. So it was sanded at the pro shop on Saturday. I took it home and put it in a bucket of hot water to get oil out of it.  Now its ready to go back to the pro shop to get resurfaced.

I looked at the ball's original prep process on Columbia 300's site and it confused me. Here it is:

800 Abranet™, 1000, 2000, 2000 Abralon®

Does this mean they did two passes of 2000 Abralon? If so what would be the purpose of that?

Before seeing this I was thinking starting out with something like 500 Abralon, then going straight to 2000 Abralon. Then adjust based on what we see at the lanes.
 

I can't speak for Columbia as I have no idea, but I resurfaced both my Motiv Primal Scream an Thrash Frenzy 2 weeks ago using Motiv's resurface instructions and I  must say, both balls came out perfect and appear to be just as good as they were NIB.

EBI does plenty of research on coverstocks and finishes
they are ever evolving in their process to get a desired result on the lane
i do like the fact that they spell out what they have done to the ball to get OBB

i do look at the steps and grits used, but i fine tune them for me.
most of the new balls i get, i put on the spinner befroe i use them, so i can replicate that surface later.
in todays game, with surfaces being so important, you have to be able to tweak them to compete.
experiment with this, 500/2000 or 1000/2000 is not much different IMO
i have been using 500 + polish with some decent results, gets through the heads, has some teeth under the polish.
little less ball maintenance this way vs just a dull surface which gets lane shine pretty quick