What effect does Methylated spirits have on coverstocks?

[rembrandt]

Back in the 80's when i was a junior,a fellow junior bowler asked another junior bowler "what happens when you put methylated spirits on your bowling ball?.....the reply was " it spits $2 coins out the thumb hole.....the reply was so quick & very funny at the time.......myself & one of the bowlers mentioned here recently spoke about this after all these years......had a laugh again