How to gluing two sheet of MDO plywood?


New Member
Guys I'm going to be using two sheets of 1/2" MDO plywood to strengthen the stringers on our 30’ Reinell. What I would like to know is if I’m doubling up two ½” pieces of MDO G2S do I need to sand off the paper surface on both pieces or can I just glue the two pieces together without prepping the existing surfaces of the MDO plywood? I heard that the paper is the weakpoint but I'm also hearing that the paper absorbs the epoxy and strengthes the wood. Anyone know what I should do?