Talk to a medical professional. Forums like this are a very poor way to get good medical advice. If you can find an ER nurse they'll be able to tell you everything you could want to know.
However since you've asked here, I'll try to offer something useful.
Look at how ERs treat motorcycle road rash; First they scrub every last bit of grit out of the wound (and this hurts like hell - they are far more concerned with diggin that shit out than they are with not causing further damage). Then wash it out. Then apply ointments of some variety (I believe antiseptic, but I don't know what other functions the ointments may provide). Then wrap it in sterile bandages. Wash the wound and replace the bandages & ointment as needed - which is daily for a motorcycle accident - until a fresh lays of skin is formed, at which point bandage replacement slows down but doesn't stop.
It helps to understand that in the motorcycle community there is only one injury called Road Rash. In the bicycling community there are two.
In the motorcycling community road rash is not a typical scratch, it is a friction burn. That is why it is treated so seriously, the risk of serious infection is very high (just as it is in any bad burn). The injuries extend well below the visible scrapped up tissue.
In the bicycling community, we often have guys who crash at 10mph, scratch themselves up, and then call it road rash. It is a different scale of injury from what happens at higher speeds (which btw, bicycles definitely get into - if you go down at 35mph on a bicycle, you should probably visit a hospital). It hurts, it sucks, but it is essentially a bigger version of the scraped knee you had when you were five, and risk of serious infection is much much lower. If you keep it clean it out well, and change your dressing every day or two, you'll be fine.
I find the idea of cutting off skin unsual. Again I'm not a medical professional, I don't know that it is wrong, just not something I've seen done on any of my injuries. Normally skin is left on (especially in the case of blisters and burns), as it provides another layer of protection for the damaged tissue.