I recently got a mag mount antenna, which I stuck on my Jeep wrangler, inside on the wheel well. The antenna element is above the metal part of the body, and I believe the signal should have no problem escaping the canvas soft top or plastic windows. http://www.amazon.com/gp/product/B0045EQUBK/ref=oh_aui_detailpage_o09_s01?ie=UTF8&psc=1 I am transmitting about 5 watts on 2m and 70cm, with an SWR of 1.2 and 1.4 respectively. Using an Anytone TERMN-8R radio. When I try to hit distant repeaters, I seem to do better with the rubber duck antenna than when plugged into the mag mount. Yes it's an un-scientific test, but it's repeatable every time - the rubber duck gets there and opens it up, and the mag mount does not. Nearby repeaters are no problem for either antenna. Would it help me to scrape paint off that wheel well for a better contact? Should I actually see continuity between the coax shield and the car body, or wouldn't you expect that from a mag mount?