Don't forget powdered graphite! Makes things come to life!!!! The only problem is sealing with a spray takes away the metallic feel, so I usually rub the graphite on in the end and don't do much touching afterwards.I am experimenting with colouring pencils to obtain stretches and worn areas... and I am staying within the lines on my colouring book
then using silver paint for really worn areas and finally playing with a silver pencil to ooowwwww...still got to ad washes and pastels