Bob started as a colorist for Marvel in 1978.
He’s had long runs on the Spider-man books, Captain America, GI Joe, Master of Kung Fu, Alien Legion, Iron Man, West Coast Avengers, and at one time or another worked on just about every Marvel title.
Since leaving Marvel he is mostly doing hand coloring on fan commissioned one-of-a-kind recreations, and is available for digital coloring.
https://www.facebook.com/bob.sharen
