I wonder what you think of this: A 215 average bowler told me that he uses an old Hammer Razor Blade that has over 1,000 games on it. He says that he bakes it in the home oven every 100 games, then rubs it with a very fine sand paper and finally polishes it with Simonize wax. He uses it on medium oil conditions and it works wonders. He's a stroker playing between the 2nd and 3rd arrow.
Martin.