Everyone has their favorite methods. I use a Norton 4K/8K for major refreshes. However, I have a couple of double sided paddles that have diamond paste from 3.0 micron down to 0.25 micron on them that will keep an edge in good shape for a long time. Generally, if a razor is pulling, I can refresh it with on the 0.5 micron and 0.25 micron paste. I have recently started adding some stropping on newspaper which is reported to be about the equivalent of 0.1 micron paste before finishing on the plain leather strop.