Today saw the sanding off of the 360 grit whiskering, re-wetting it and sanding again with 360, then wetting and sanding with 600 grit. I left it for an hour after each wetting before sanding but there was progressively less whisker standing until there was almost none at the final wetting.
Next step has been to start the flooding process where I kept as much 50/50 (tung/veg turps) flooded onto the surface for about an hour till it showed it was slowing on the uptake into the wood. Then I rubbed it down hard with a cloth so there was nothing on the surface. Will do more flooding tomorrow, then sand back to the surface before filling the grain.

You can see where there is dry wood on a couple of places.