Originally Posted by rhyary
Any issue with using existing bolts that hold the bumper to the frame under the car?
Using existing bolts is OK as long as the braid itself has good contact to the frame or steel and you are not using the bolt as the conduction path. That's the point, to make various pieces of steel all at the same RF level. You do accomplish some of this by using DC grounds and so something is better than nothing for the most part. However all small wire grounds show some sort of odd behavior at different frequencies and even RF braid will start to have odd characteristics depending on size (width, number of wires, etc.) and quality of connections at some frequency. You can only do the best you can, so just get the easy stuff to start.