If your worried about infection, try putting some Neosporin on th wound.
I can understand a paw wound taking its own sweet time to heal. Dogs' feet are in the dirtiest places, and they always want to lick these kinds of wounds.
As to the facial wound, I suggest you have your vet take a quick look. While it may not look too badly on the surface, there may be a deep pocket of infection hiding underneath the scab. You certainly don't want to risk blindness or something worse. It may be that she only needs a short course of antibiotics to speed up the healing process, but you won't know until you ask your vet.