First everyone, thanks for this site. I'm a woodworking but have reading deeply here about sharpening. I would put my edges against almost any woodworker I know prior to coming here. But I've learned some things here that have allowed me to more quickly and easily work some very gnarly, beautiful, expensive boards. So, thanks for that!

I'd like to get some advice about nagura use with Suita stones. One of the stones I have is an 'ohira suita' I bought off ebay (cheap!!!). It was low cost from a one time seller, and so I have no idea what it really is and don't really care. What's important is: it's VERY hard, right up there with a shapton stone, it does have 'su', and it leaves a wickedly sharp (what I call a 'curly bubinga grade' edge) *IF* I'm willing to spend the entire length of "revenge of the sith" rubbing a plane blade on it. I need a way to raise a slurry. I did use a diamond stone to raise a slurry and that seemed pretty brutal. Scratched the hell out of the stone and it'll take while wear that out: I don't really want to do that again.

I've read on Alex Gilmers site that you shouldn't use nagura with Suita stones because the nagura grit will get into the holes and you'll never get the coarser particles out. His site also says that you can use tomonagura. So here is the thing. I do have a tomonagura that came with another stone I have, and that (very hard) stone is supposed to be very, very, very fine.

Would I be risking anything if I used this tomonagura on the suita stone to raise a slurry?