An ointment my Dad used on us as kids, was Ointment of Icthamol. It is based from crude oil(says it in the ingredients). That stuff is black and needs to be covered well with a bandage to prevent dark clothing stains, but it draws out infections like nothing I've ever seen. A couple of years ago I looked around and didn't find it, but found another ointment with (crud oil) in the ingredients, and it worked just as well.

http://www.elydrugs.biz/ichthammol.html