LOL right! , yeah i'm used to metal and fiberglass, the occassional stretched canvas. I actually laid down paint on the whole backside. That basically fixed it over night. Not completely though So I'm Using your trick next.
Thanks man, Ive got a huge roll of that stuff I never use so I just went with it. I ended up with the canson comic IB, I figured if I was gonna base it out in varnish it probably didnt matter too much what the board was.