Is there any polish that contains no abrasives. I use Bean's and it is as thin as water but I am sure it has some small amount o abrasives.

Rule 18..
When can an acceptable cleaner be used on a bowling ball?
Unless otherwise provided by league or tournament rule, cleaners designated as acceptable by USBC standards can be used on bowling balls at any time during USBC competition. For a complete list of acceptable cleaning agents, see bowl.com or click here.
 
When may I alter the surface of my bowling ball?
a. Cleaning – Cleaners approved for use anytime may be utilized before, during or after certified competition; Cleaners approved for only before and after certified competition may only be used during these times.
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; only an automated, self-contained polishing machine may be used.
 
A tournament consists of doubles and singles events. The singles event is bowled first immediately followed by the doubles. Can I sand my bowling ball between events?
No, Rule 18 does not allow the outer surface of any bowling ball to be altered with an abrasive after the start of competition. This includes balls that have not yet been introduced into play.
The start of competition is defined as the point the first ball is thrown by any participant for score. Since the tournament is conducting singles and doubles concurrently, you cannot alter the surface of the bowling ball (including sanding) between events.
 
Can a bowler use an abrasive on just the track or just a portion of the track of the ball?
No. USBC specifications require that the entire surface of the ball be sanded in a uniform manner. Sanding a ball in any other manner would be a violation of Rule 17a, Item 1. The penalty for a violation of this rule can include disqualification, forfeiture, removal from the league, and/or suspension of USBC membership.


Clarifying rules about in-competition surface adjustments to bowling balls
Due to recent confusion, the United States Bowling Congress is clarifying its rules regarding the use of bowling ball cleaners, polishes and surface-altering abrasives before, during and after USBC certified league and tournament competition.

During competition, bowlers may apply bowling ball cleaners and polishes by hand in the bowling area only; they cannot be applied outside of the bowling area (i.e. in the pro shop, locker room or equipment paddock) or with the use of a ball spinner. Cleaners and polishes used during competition must contain no solids or abrasives and be found on the list of acceptable Commercial Ball Cleaners/Polishes found here.

During competition, bowlers also may use bowling ball cleaning and polishing machines, such as the Lustre King or Storm Surface Factory, provided they do not use any of the surface-altering abrasive options those machines may offer.

Abrasive pads, such as sandpaper, Abralon or Scotch Brite, only may be used before or after competition, and any alterations made using these materials must be made to the entire surface of a bowling ball. Bowlers are not allowed to alter specific areas of a bowling ball's surface (i.e. the track area, flare lines, etc) without altering the rest of the ball's surface in the same fashion.

Cleaners and polishes containing solids or abrasives may be used before or after competition provided the substances are included on the list of acceptable Products Containing Solids or Abrasives found here.

Individual leagues and tournaments reserve the right to place additional restrictions on when and how bowling ball surface adjustments can be made.

For instance, during the televised finals of U.S. Women's Open and Lumber Liquidators PBA Tour events, ball representatives can sometimes be seen altering the surfaces of players' bowling balls between matches. During those events, each television game is considered a separate round of competition, so bowlers are allowed to alter the surfaces of their bowling balls between each of those one-game rounds. This is not the case during league play where all games in a series are considered part of the same round.

USBC encourages bowlers to consult league officers or tournament officials before making surface adjustments to their bowling balls

 Here is the thing.

 You are OBVIOUSLY correct in doubting whether it is legal or not, because it is not. The problem is, is it worth the trouble it is going to be to bring this to light?

 You will be labeled a whiner, a crybaby, a troublemaker, and any number of other things, and probably banned from using the pro shop (if you ever did).

 The sad truth is, you are most likely the only one that cares. And, since that is true, all the people who don't care will likely agree with the people you are going to pi** off! making you the bad guy, even though you are correct.

 Trust me. I have been where you are. Nobody will care but you.