Do you ask for these specific balls or PK18 solid in general?
I did a lot of surface experiments with my Awesome Finish (which is a PK18 solid ball), from the OOB polish through re-polish, 4.000 grit Abralon and finally Finesse-It II Trizact compound. Style stats in my profile, I'd call myself a stroker with lower speed (~14.5mph) and medium revs (~275RPM).
Typical lane surface would be older Brunswick AnvilLane and System300 synth. Oil patterns woudl also range from 35' short and thin house shots through 38' THS to 42' flatter patterns - overall, I witnessed the following reactions:
With the AF, the 4.000 Abralon surface made the ball read the lane much better and earlier than polished - I'd say 4-5' earlier on the same pattern. The breakpoint remained pretty sharp, but I rather "blame" it on the killer core inside. Not an oil ball, but I am sure that 2.000 Abralon or a coarser surface makes the ball/coverstock suitbale for oilier shots, no doubt.
The AF worked very well with this sheen surface, also handling oil and a carrydown slightly better than OOB, but it was, concerning its reaction, too close to my S&A. So I added the Trizact compound for added length (the PK18 solid took this change very well, the overall reaction fell between the 4.000 surface in control, and the OOB polish in length, more or less the best of both worlds), and that's what the ball's prep still is.
Hope this is a bit helful?
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DizzyFugu - Reporting from Germany
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