your getting your whole car painted soon right? why not shave the antenna and get one of the ones that goes inside the windshield like this
http://cgi.ebay.com/NEW-ON-GLASS-AM...9930949QQcmdZViewItem?_trksid=p3286.m20.l1116
Just got it and PUT it on...WHAT A POS!!!
It's like having NO antenna. Then I contacted them to complain and they just said that have never had any problems, and I just need to put it higher on the windshield.

Wait till they say my feedback

RC