Hello,

I recently purchased a King 4k stone from here: Japanese Honing Waterstone - 4000 grit, Knives, Knife Maintenance, Waterstones, Japanese Water Stones

I'm intending to use it to start putting the edge back on an old straight that I purchased from an antique shop and cleaned the rust off. I will then finish it off on my existing pre-lapped 8k and 12k slate stones.

Do I need to lapp the 4k, and if I do what does this involve?

Thanks for any help anyone can give me with this!