Sheen's hair!
How long has he been on the road? And still his hair is CLEAN, doesn't grow any longer and he looks like he just came from the hairdresser!
shareHe appears disheveled in some scenes... but what I noticed is that while he has clearly dyed his hair and seems to have done so entirely, halfway into the movie grey hairs start to appear around the ears, scalp, forefront, as if the dye wears out :))
Our first intuitions are the true ones.