I need to cut a piece of melamine the same size (5x4) as my assembly table (which has a small sag in the middle). I need a very flat surface for a pretty long (64") glue up. I am going to have to cut the sheet on my second "workshop" - my driveway. I put 4x8 sheets down on two pieces of 2x4 hard foam insulation and cut with a circular saw. The cuts don't have to be perfect but I hate to a make a mess if I don't need to. A little web research says to lay it white side down with packing tape over the cut line. I should possibly score the cut line.
Is there anything else I should be doing to have a reasonble job?
TIA
Dick Snyder