I'm an engineer at a lead/zinc smelter, so I know a thing or two about lead exposure, but I'll just make some comments refering to some above:
A) Lead doesn't take 1-2 years to bring your blood lead levels into a safe range. Your body actively eliminates lead, however, some does get stored in bones, and that will remain almost forever but it's not particulary harmful.
B) like mentioned above, it's the lead salts that are particularly dangerous to inhale.
C) Lead cannot be absorbed from the skin, so the only points of entry is the mouth, nose, etc.
D) there are no special 'lead shampoos or soaps' that are more effective than regular soap. If there was, we would have it in our change rooms.