But your ball in an oven at 130-150 degrees.....
I have, with many balls, and gotten rid of the oil and rejuvenated the balls. Never had any problem with coverstock cracking and all that other crap. Most of it is just advertising from Ebonite anyways.
They say, in the same article, that plasticizer makes a the ball a resin and makes it hook. Then they say too paragraphs down that plasticizer is the cause of ball death.