Recently there was an article in one of the woodworking mags. that told you how to make your own table saw inserts. The material list calls for tempered masonite. I have always thought of tempered masonite as being slick and hard on one side and unfinished on the other. Is there such a thing as masonite that is tempered on both sides?
Yes Kelly--there is a Santa Claus---sorry, wrong letter--:D
Ask about tempered hardboard----Masonite being a brand---as you noted, it will have a hard, finished surface on both sides. It also, in my experience, is a very dark brown, as opposed to some material with lighter tan look---also, a one or two foot section of 1/4 inch should have very little flex. I say this, because big box stores will try and pass off almost anything as hardboard or Masonite. Check with small lumber yards or even hobby/model shops. It's great material---well worth the effort to find.
Just yesterday, we used clamps after glue simply to take the bow out of the wood we were using, and it straightened everything out for us. Usually though, any time you lay up a project the clamps are...