Seems quite expensive, might try this:
http://www.amazon.co...3SJC6BF7CG07J0F
A little goes a loooong way with this stuff. And don't just do headlights, do any exposed plastic.
Black plastic under wing mirrors, plastic sill plates, engine bay plastics, B-pillar plastics, etc.
C4 is the same stuff as C1 and C5, so it will also do bodywork and wheels too. Basically every exterior surface on the car except glass.