Scuffing within our KORA system means working on bare-knuckle striking. Experience has taught our group that there has to be a balance between contact and repartition to avoid long term damage to the hands, wrists, elbows, shoulders and neck.
Over the years, I have seen people, even pros, overdo it, and the results have always been long term, career-ending injuries.
So light and often seems to be the way for most people. I tend to hit my bag bare-knuckle after each training session for a round to build confidence and get used to the slightly different feel. We do it to build confidence, and it gives us a choice between using palms and fists. You can actually intermix your scuffing sessions with palms, hacks, slaps and fist sticking.
Add elbows, clinch, knees, and kicks to practice the cross over between each.
Please see the video of me below, filmed just post covid infection as an illustration. Please note the safety advice and find your safe personal balance.