May I say something about lapping?
There is nothing wrong to lap piston sleeve as long as you use right tool and after lapping your parts are still round within tolerances (+/_ .002 mm).
Cross hatching is result of surface finish after using honning procedure and it is not intended to be there, just pricing of mirror finish is way to high to have it.
The oil will stay on the wall of sleeve/piston anyway without using cross hatching-it is happened on molecular level of chemestry and has nothing to do with cross hatching. One of the reason why castor oil in use in fuel is that forces between moleculas in castor oil are so great and way better then any known lubricant (with tech specs we need for running our engines).
Edward