Question:
How do I minimize or eliminate the mustache shadow after I shave? Even after I closely shave in the shower, I can still see the dark shadow from where the mustache used to be. I'm not sure how to call this, but how do I remove it?

Answer:
we might just be SOL.
I have very fair skin and a mixture of light-brown/blonde facial hair. Even with a new Merkur blade and some fine shave cream, I'll have some shadow wherever the hair grows. This is a two-day shave I'm talking about here. There doesn't seem to be anything that will make that go away.
I suppose you could try Nair for men or an expensive electrolysis treatment. IMO, a shadow is just part of my face, so I don't worry about it. And if you're a model, the airbrush will take care of things
-ben