quote: Plucked from the USBC Rule Book from bowl.com:12. Approaches Must Not Be DefacedThe application of any foreign substance on any part of the approach that detracts from the possibility of other players having normal conditions is prohibited. This includes, but is not limited to talcum powder, pumice and resin on shoes, and/or soft rubber soles or heels that rub off on the approach.Commonly Asked Questions – Rule 1212/1One of the bowlers is having a difficult time sliding on the approach and applies a commercial product purchased at the center pro shop to the bottom of his/her shoes. The product is designed to help a bowler slide. The secretary says she has received a complaint from the opposing team and notifies the individual to stop using the substance or the game will be forfeited. Can an officer tell a bowler to stop using the substance and declare the game forfeited?Commercial products, talcum powder or any substance applied to the shoe or approach could be in violation of Rule 12. If a league participant uses a substance and somebody complains that it prohibits him/her from having normal conditions, the league officer should require the individual to immediately stop his/her action. If the individual refuses, his/her games are subject to forfeiture.