CorragatedThose will work, and if they have a padded backing you will get what is called a convex edge which is a rounded edge more than a flat hone. My advice is to just practice on a good set of stones. I love the DMT stones and they are a local product. Made here in Marlborough Ma. ( I plow thier plant) IF I go there this weekend I will see if I can find a proper stone for ya.If ya need a knife to practice with. I also got a older pocket knife I can send ya. Just send me your addy and it is yours.
Corrugated, Those like like the files my girlfriend uses on her nails The bathroom looks like a well stocked drugstore.