ORIGINAL: GaryHarris

For some reason I was allways against buying a long sanding block. What I did was use a 2' long level from Home depot, the orange one, a two pack of 3''x24'' 220 grit sanding belts and some spray on contact cement like 3M 45. Cut the sanding belts at the joint and down the middle length wise. Spray the contact cement on one side of the level and the backside of the sanding belt and stick together.

Walah! Long sanding block on one side, flat edge on the other side for weighting down stuff like wing sheeting.