I am generally the same as above, but with some quirks 
(well it is me!)
Firstly after sanding with the lathe on I turn it off and sand along the blank to remove any ridges or deep rings...
I then wipe the blank over to remove ANY trace of grit, before moving to the next...
As a finish I tend to use melamine lacquer or Rubio (but after reading a report into it that might change)... Truoil for Walnut....
Before assembly I always run a snail countersink around the tubes and a flue brush through, then optically check... Its now saved loads of tubes from cracking blanks and takes moments...