For you more knowledgeable guys:
how about giving us a primer on material and finishes? Other than the difference in looks, do I care whether a gun is in blue, shadow gray, stainless, titanium, and whatever other...? What are the relative advantages and disadvantages of each? Is there a difference in how each has to be taken care of? Or, if it is too much information to answer, is there a resource where a person could do the study? Thanks!