Time to add some strops
One of my favorites is the 0.75 micron CBN. I you want to start off going from the the stones you have the 0.75 is equal to a 24k stone and a nice transition and maintenance strop. From there you can jump to quarter micron CBN and then tenth micron CBN. This will give you excellent results. Using nanocloth to put these compounds is the best approach although balsa will give you decent results.