At Karamat what they do with students is simply use a hard board, carpet tape (sticky on both sides) and stick wet&dry sandpaper about 600 grit on it. They also use a kitchen ceramic tile for the hone. After experimenting you can graduate to a dedicated stone or a ceramic-diamond pocket whetstone for field sharpening such as the Fallkniven DC3 and DC4 because you know what you want.

Mors doesn't bother doing it stroke by stroke or doing a "clockwise circular motion", instead he cuts to the chase and just rubs it back and forth very quickly then use an ordinary leather belt to strop.