What did you plug your fender antenna hole with?

Go to a electrical supply house. The have a seal that is smooth faced and made of stainlessthey have a foam gasket on the backside with a small stud and washer with a wing nut. They come in various sizes. They are made by Hoffman. So ask for a hoffman ko seal in stainless in the size you want..

http://www.hoffmanonline.com/produc...229332&catid=229332&itemid=3427&view=overview