Great stuff Andy and the weathering is top notch and really complete that wonderful iconic model
I'm a fan of graphite and have been using the stuff for the wear and tear on my models for decades! I like to use a large make-up brush for big areas and small ones for the details as well as make-up QTips.
Yeah you can’t beat it for some details! If best-practices are followed it’s pretty safe. I wear a respirator or a particulate filter mask when using graphite or any powdered pigment for that matter. A shower and a change of clothes afterwards is a good idea. Then there’s dust containment in the workspace. An active ventilation system, dust collector or exhaust fan to the exterior is great too (with a quick wet wipe-down of the area.) That being said - love it!