How to use and clean diamond sharpening stones

General information, including selection and preparation of diamond and cubic boron nitride sharpening stones is presented here. 
So I will cover some specifics in relation to diamond sharpening stones. 

Why diamond sharpening stone
Diamond is recommended for sharpening of high alloy steels, like martensitic stainless steel CPM S90V. Diamonds are made of carbon atoms, which "burn", interacting with atoms in carbon steel. This is visible, while using powered tools, and may not be an issue for hand sharpening. 
Anyway,  after sharpening of carbon steel with diamond:
- Edge of knife will be sharp, although could be better.
- Diamond may cause deep scratching which can be difficult to remove.
- Diamond may cause chipping at the edge while sharpening.

Use of lubricant for sharpening
  Use of lubricant is recommended for metal bond diamond stones, but it all depends on how you prefer to work, dry or wet. Clean knife after sharpening with one drop of this lubricating fluid if you sharp dry, or use as lubricant if you work wet.  
  Working wet, you make puddle on the stone, which prevents the metal shavings from clogging the stone which slows down the sharpening process.  
Our diamond sharpening stones do not require much maintenance, but they do need to be cleaned periodically to maintain optimum performance.  

Use of cleaner for diamond sharpening stones
To clean your diamond sharpening stones just take a drop of this cleaner so the  stone puddles up. Then scrub the stone, including its nooks and crannies. Be sure to allow them to dry before putting them away. The cleaner degreases, quickly evaporates after application and not leave a "greasy" film.

Sharpening with Poltava diamond stones