Ok, I don't mean to hijack this thread, but I have a question too about lapping. I have Naniwa Specialty Stones in 1k, 5k and 10k. I've used them a few times and I think they need lapping. I was going to buy a Naniwa lapping plate in 220, but the website recommends them for use on up to 5k stones. So, would it be no good to lap my 10k?

I'd love a DMT but I cannot justify the cost.

I'm considering using wet and dry on a kitchen work surface which I know is flat. But which grains should I use for each stone? Thanks gents.