This is controversial for sure. Even I hate to tell people to do this because of edge rolling issues, many will do more harm then good. I think for the majority of people a really fine stone will yield better results.
OK that said, the safest way to go is hard felt or a leather with very little give. the felt is nice because you can lean on it and not round over the edge where leather you have to use a lighter touch.
As for the actual process it's the same as double bevels.