Look at the edge, straight down, make sure you do not have any shiny reflections. Look at the bevel and the edge, for chips and deep stria. If you have deep stria, you will have to drop down in stone to remove the stria, if chipped, joint the edge lightly 1-2 strokes and re set the bevel on the 12k.

Strop the razor on linen after jointing and before honing on the 12k to remove some of the ragged edge then finish on the 12k.