Grinding Mill Abrasive Wheels Scrap

My t c wont do 20 planer knives, so i use a surface grinder.Its not ideal ot have the scratch pattern parallel to a sharp edge, but i hand hone knives after grinding to polish the edge anyway.I did what you did once, long ago, by making an arbor for the mill-drill, and using a 4 cup wheel.I rigged up a sort of guard around it with scrap.