Hey Vasilis,
Yes, you should polish it up like your Money and see how much more length it gives you. Remember, the longer we can delay the energy of of a bowling ball, the more powerful it is when that energy is released. So yes, you would get better length and finish by polishing it up. If you ever encounter any heavier conditions, just bring it back. Track's covers have been very friendly to adjustments. (just had an feeling of deja vu)...(twilight zone music begins...)
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Rick Leong
Ten Pins Pro Shop
Track Intl. - Amateur/Pro Shop Staff
Vise Inserts Staff