I have had quite a few pieces from Utah that came with a polished cover. The ones I can think of are the Rapid Fire, Cell Pearl, Horizon, Mystic, Rapid Fire Pearl, HyRoad, and Gravity Shift. I did not alter the cover on all of these, but some I did and others were altered by the pro shop after a plug job. IMO, I have always found them to be impossible to get back to a good reacting polished piece after altering the cover. By far the most notable of the bunch was my Gravity Shift.
I got it used with 1 game on it. The shop plugged it for me, cut the plug in a Haus Machine, and polished it back up. Since I didn't throw it at OOB, I didn't know what to expect. I ended up with a ball that wanted to turn the corner but didn't. I tried various surfaces both dull and with various polishes with poor results. I had Hank Boomershine personally look at it and he suggested a new place for the x-hole (it had one but I had it plugged before meeting Hank). This helped somewhat, but I still wasn't happy with it.
It sat in my basement for 3 months until last weekend. I decided to try some of Storm's polish (reacta shine) to try and salvage it. I got the bottle from Buddies and followed Storm's recommendation of 500, 1000, and the reacta shine. I tried the ball out and it was like a totally different piece. Strong midlane that actually turned the corner very well. It was how I expected it to be. I used it in tandem with a Rapid Fire on Viper the other night to shoot my highest ever PBAX series. Then tonight I used it on a THS league for a 797. /figjam
I suppose it's possible that the other polishes out there just don't work as well on these balls as the stuff that's made for them. I haven't tried everything, but I did try Ebonite's FF polish, Beans, Snake Oil, and Black Magic all with different underlying grits with poor results. I'm excited to try it out now on my other stuff that I had written off.
It's worth noting that other brand balls that I have used haven't been this sensitive. I've used the above named polishes on those pieces with good results. Coverstock prep is hit or miss as it is. Not everything will work due to all the variables. I just hadn't found ANYTHING until now that worked on Utah balls. I had read a lot of posts about the Gravity specifically being hard to bring back to box. Maybe this will help someone out there.
Don
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"You cannot change the stripes of a leopard."
~Emmitt Smith