Thread: How can I prevent my truing stone from chewing up my high grit stones?

120 grit is very abrasive, most flattening hones fall into the 400 to 600 grit range.
You could use 600grit wet n dry to smooth your Norton out then use your 1k King after to maintain your Norton.

A good investment is a diamond hone to flatten and maintain your hones, you don't have to spend a lot of money though.