2017-2018 USBC Playing Rules
http://usbcongress.http.internapcdn....18Rulebook.pdf
Commonly Asked Questions – Rule 18.
18/1 When may I alter the surface of my bowling ball?
a. Cleaning – Cleaners approved for use any time may be utilized before, during or after
certified competition; cleaners approved for only before and after competition may only be
used during these times. The use of a ball spinner is prohibited during competition.
b. Sanding – You are permitted to sand the surface of your bowling balls prior to certified
competition; however, the use of abrasives is strictly prohibited once the first ball is thrown
in the competition.
c. Polishing – You are permitted to polish the surface of your bowling ball prior to certified
competition. However, once tournament or league play begins, the use of a ball spinner is
strictly prohibited.
Approved Cleaners and Polishes
http://usbcongress.http.internapcdn....ner_polish.pdf
Non-Approved Cleaners and Polishes
http://usbcongress.http.internapcdn....ner_polish.pdf
Note: Certified competition begins when the first ball is rolled for score by "anyone in the league or tournament"
Also you can't use the ball polishing machine (Lustre King) once certified competition begins and yes Micro-fiber towels and leather shammys are okay to use.
Unless otherwise provided by League or Tournament rules.
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