Hi All, I got 1-1/2" Marlon seacocks for my cockpit drains and the instructions say to seal the thru hull flange w/ Teflon tape. My thru hulls for bilge pump and engine exhausts are bronze and I was wondering if I should use Teflon tape on those as well? Should I also coat the threads w/ some lock tight? Thanks, Roger 148 1243873076.0