Aw, C'mon SD, everyone knows the more a plane is flown, the more flames and nekkid chix it accumulates!!

jetjohn, look here: http://www.clubhyper.com/reference/weatheringda_1.htm ...its a start. Weathering, really good weathering is more of an art than a step-by-step. Find a really scale jet you like and its owner/builder/painter and beg. Everyone has different opinions of what looks "real" and what is over done. I prefer lightly weathered with realistic wear markings in the right places to the looks of one seemingly drug through a burning building myself.

A google search for model weathering will yield much more information.