Here is my tried and trued method(which was taught to me by my UCI license holding SO who has had more crashes then one should have,lol!)

in shower:
1)Anti-bacterial soap, scrub.
2) hydrogen peroxide

out of shower:
1)iodine solution
2)antibiotic cream
3) tegamet where it will stick
4) for places that tegamet does not stick- use anti stick gauze pads with the fishnet sleeve stuff over it(for arms and legs) or anti stick gauze pads to cover whole area and then the white adhesive tape around it.

repeat daily

it isn't fun but it does work.

Your road rash looks painful! I hope it all heals up and you feel better!