Seems like you got away very lucky. As stated above, have the wheel/tire rebalanced and the alignment checked. If it were me I wouldn't touch-up or refinish the wheel just yet. If it still bothers you in a year and all your other wheels are still mint, then go get it refinished (or easier yet just buy a new one and have a full-size spare).

-Cyrus

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2002 BMW X5 4.4i