Also, if you are using a plywood with voids (most plywoods) you will get those little chunks of veneer that bust out. It has to do with the quality of the material you are cutting (which is getting worse and worse). One type that will tend to chip a little less is Armorcore plywood. This has 1/8" thick MDF right under the outer veneer, on both sides of the plywood. The MDF tends to make the veneer surface smoother and more uniform in thickness throughout because they sand the MDF before putting the outside veneer on. For my 3/4" plywood, I use Armorcore exclusively. More expensive, but much higher quality than veneer core.