Thanks for the discussion so far. Let me post the question below again:
Originally Posted by Asteger
The other thing ... is whether to coat the bottom of the stones as well. Often this seems to be done, but I've also read that traditionally urushi might just be applied to the sides of naturals. Extra protection if the bottom is coated, of course, but if the bottom is pretty strong and stable it might not be needed and I was thinking that not having urushi down there might allow the stone to breathe better and dry out well.
Does anyone just coat the sides (with lacquer or whatever you use) our does everyone like to do the bottom as well?