Hello sailors. I'm in the process of stripping all the exterior teak on my boat. I had to remove a split plank from the bridge deck and in doing so found that the deck was made up of ~1/4" teak planks fastened with (brass?) annular nails and a very tough, black, rubbery compound to plywood covered with a thin layer of fibreglass mat. The glassed plywood underneath was damp. Is this normal? If not, how do i fix? Also, any suggestions on how to remove further planks. I basically cut through the black compound with a paint scraper and then pried the board up. Some of the nails came up while others tore through the wood leaving biggish holes behind. Can these boards somehow be reused?