Car wax.
Or any clear(rustoleum, Krylon, etc) spray.
Those would be my choices.

hadn't thought of car wax nonacook, thanks for that idea
I'll also check out the clear spray
Thanks

My first thought was the glossy grout sealer.
Ann

Actually, if you are talking about the luster of the new ball, you may want to consider this:

There are two kinds of polishing compound you can get from auto parts stores, one to remove scratches, and one to give it a high shine.

This will be a more perminent solution.

dcarch

Thanks for the ideas to check out. I want to ball to be nice and shiny and it will be outside so I'll want some permanent.

WEll, I know for sure that you do not want to use clear nail polish. A couple years back when we got on the polish balls kcik I had made several. After being in the sun and the heat all my nail polish turned brown black....
Love, Jules

Thanks for that advice Jules, nail polish has been banished from my list.