Glassing over Thru Hull

[other tom]

what ed said....although I have had great success by simply doing it in one step from the inside....tape a piece of mylar or 'mica (waxed) on the outside of the hull (after the grinding/cleaning steps) and start with a thickened mix of WEST and high density/chopped fibers. Then lay in your wetted-out disks of cloth/roving. Key is to expose as much of the laminate as possible on the hole edge and the inside of the tapered laminate. Filled at least 12 holes on a 3/4" thick Bertram hull this way, including main raw water intakes that were 6" in diameter. still floating (this morning)....