englishal's suggestion of a Hawaiin shirt is worthy of study. If you can get one in eye searing colours than you wont have to wear a high vis vest when visiting one of those airfields that has pretensions to becoming "International".............
I disagree about the jeans though. Ever been on a firefighting course?? Petrol dripping over ignition switches can catch alight. Burning 100LL on hairy legs hurts, straight away. On denim at least you get a few seconds to put it out before growing large ugly scars on your pins.
Re sunglasses I think Dame Edna or Elton John should contribute to this bit