Admittedly, I'm new to de-oil processes.
the 1st few I did didn't seem to work so well (not alot of oil came out of it)
I don't know if it was the characteristics of the cover or what
say 30 games, 3000 grit used, fairly higher volume place
for the purpose of this conversation, it was a Columbia VOW
took it to 500 at someone else suggestion (don't remember who)
got a bunch of oil out of that ball, puddles in fact.
put it at 1000 + polish and it seemed to have similar reaction with less maintenance afterwards since it was now polished
Makes we wonder, what is the proper surface prep for de-oiling use?
Some people feel that sanding the ball rough, 360 - 500 grit, "opens up the pores" of the resin surface and helps get more oil out from deeper. I am not sure if that is true, but it s logical "on the surface". CHemically speaking I have no idea if the idea is valid or not; I am not a resin chemist. It certainly doesn't hurt if the ball needs a total resurfacing after you have done an oil extraction. However, if the ball only needs a surface refreshing, sanding it rough can remove extra surface and force you to do a total resurfacing.
FYI, logically speaking if you polish a ball that you previously had dull, you are obviously using or intending to use it on much less oil. Therefore, it will now be subject to less oil and should over the same amount of games, absorb less oil than when it was dull and used on heavier oil.
From a personal perspective, I use many different balls, mostly testing, in league and I not only bowl mostly on light oil, I am diligent in cleaning the ball thoroughly before I leave the center and put my balls back in the bag. Almost no ball I use regularly has had any oil come out of it in the NuBall oven, but I have done many friend's and teammate's balls and almost all have had a little to a lot of oil come out of them.