I just picked up 3 Marples protouch chisels, wasted my time to sharpen the 3/8" one and then proceeded to put chisel to wood; namely red oak. Before getting more than 4 sides of a mortise started the chisel's edge was so nicked that I could see it without my reading glasses! That's saying something. BTW, I sharpened it on 3 diamond stones and then up to around 5k+ papers. I used the Lee Valley honing guide...
I've got a Sears chisel, 3/4" that holds an edge for quite a while. What's up with these Marples? I'm on my way out the door to return these 3 POS.
dave