Not familiar with your stone, but I would think the 1k side would work to set a bevel. However going from a 6k to a 12k finisher is a big jump. I would think it would take a long time to refine the edge enough. My preference is 1k (Shapton), 4k, 8k (Norton 4/8 combination), finisher. Personally I do not have a 12k but use a coticule, thuringian, or barbers hone. A long time ago I purchased a 4 sided leather paddle strop and pasted it with 3, 1, 0.5 diamond paste with the 4th side CrOx to smooth it out. Works very well for touch ups, or to mellow an edge from the stones.