Sorry I hadn’t read this before, as I could have saved you some time and money. Planer blades wouldn’t work in a chisel adapter or even in the WE because of their angle. You can, however, use the diamond stones to finish the edges.
Planer blades tend to see damage that is quite deep along their edges and which usually requires some sort of powered sanding to remove enough steel to eliminate the edge damage. Hitting a staple or other really hard component will do some nasty damage. Most pro woodworkers will always check for metal in the wood with a metal detect first.
I made a fixture to hold 2 blades at the correct angle out of a piece of 2X4 similar to the one shown here. You can use a table saw set at 45 deg. to make the slots for the blades. Most saw blades are 1/8″ thick and and the kerf will fit the blades from my Dewalt planer perfectly. I added some screws to lock the blades in position. You can work the edges with a oil or whetstone, but I hold the fixture upside down on a belt sander – provided it has a flat backer platen. Using 220-grit belts, I can remove the dings and chips fairly easily. Using stones as shown in the link will take forever to accomplish the same results. You can, however, use your diamond stones to finish and polish the edges.
If I didn’t have the equipment, I’d send the blades out for sharpening. Any woodworker store would or should have some resource available to sharpen blades.
.
