There are very few cigar makers that DON'T enhance their maduro wrappers in some way. I've smoked Anejos and a Padron 80th that stained my fingers, and pitch-black cheapo bundles that
didn't stain my fingers. Guess it depends on how well they "enhance" the wrappers. The worst I've ever had was an Olde World Reserve maduro. I could rub my fingers together and the residue would flake off like dirt.