Replies

1. 
   gweb | Feb 16, 2012 06:01pm | #1

   Planing MDF

   You can plane MDF however, the glues used to make MDF will dull your knives very quickly.

2. 
   wericha | Feb 17, 2012 11:26am | #2

   Neither is a good idea

   Honestly neither is a good idea.  Both contain glues, resins, and even debris that will quickly dull your knives.  If you really have to dimension sheet stock like that, just be prepared to replace your knives.

3. 
   wdwerker | Feb 17, 2012 01:00pm | #3

   plane MDF?

   If I had to plane MDF or plywood I would use my drum sander. The center of MDF is softer than the outside faces. The center of plywood might end up in a cross grain ply. 

   Good Luck,

   Steve

4. 
   CharlieL | Mar 07, 2012 03:45pm | #4

   Deleted

5. 
   woodhacker | Mar 16, 2012 08:55pm | #5

   planing plywood

   If you plane plywood from only one side you'll end up with a sheet of unbalance veneers and the material will not remain flat. The inner plies are normally of inferior quality, you're likely to find unfilled voids. If you plane down to a surface where the grain is running across the width of the planer you're running a good chance of shredding the layer.