Actually, you are in the range where the lubricant can't flow into the hills
and valleys that are still lef freelyt. In other words, you aren't flat
enough!
The best way is to put a bunch of grooves in one of the surfaces to allow
the vacuum to easily allow the flow of the lubricant into those areas that
open up.
This is a problem that often happens with grinding an optical glass surface
and we work it out by grinding the surfaces into better contact with the
grit that we are using. Ultimately tho, if the surfaces are too smooth and
in good contact with each other, you can get welding of the two pieces
together as has been found out about in space where there is no air to hold
the pieces apart.
If you want to, put some more prussian blue on the ways and do a little more
scraping to get things even flatter which will minize the hills that are
left, making the generation of a vacuum less and then scribe some flow lines
into one surface to allow for the lube to flow better.

--
Bob May
Losing weight is easy! If you ever want to lose weight, eat and drink less.
Works evevery time it is tried!