Great! Thanks for having a look at Max... I've been aching for a drawing of him for a few years now... but unfortunately lack the skills to do one myself. Here you go with some additional information.
Physique:
Max is a tall and wide man caucassian man. His build could be somewhat compared to Captain Quark (from Ratchet and Clank) http://www.freewebs.com/ratcheddeadlocked/qwark.jpg albeit ofcourse in a less comical manner. Strong arms (for fighting anything from dock workers to gorillas) flank his body. His facial features are angular and rough. A wide jaw (likely with stubble) and a no-nonsense expression makes Max someone that intimidating in his appearance. His blonde hair is kept short and out of the way.
As mentioned in the previous post. Imagine a very macho version of Indiana Jones (or more fittingly: Allan Quartermain).
Dress:
A safari-style hat on his head (something like this: http://walkaboutdownunder.com.au/images/T/hat-ak-coolabah-st-Khaki.jpg). A half-open and short-sleeved dirty-white shirt and a leather vest (elephant hide if we want to go into details) and long darkish undescript pants. He usually wears a necklace of aztec/incan coins around his neck (square/triangular.. something like that) as a reminder of his dream og finding one of the fabled cities of gold. Max often comes well-armed, his usual being a huge rifle for elephant-hunting, two large (and heavy revolvers) and a machete hanging from a strip of leather.
Companion (would be a nice touch... but obviously not a "must have"):
Churchill the capuchin monkey (http://www.1-costaricalink.com/costa_rica_fauna/wildlife_images/white_face d_capuchin_monkey.jpg) always follows Max around. Churchill wears a small leather vest (like Max) and is very intelligent.
If you need anything else please let me know.