The weathering was acheived with some 'light rust' pigment powder mixed with water and a dash of rust coloured enamel paint, then washed over liberally in 3 or 4 coats. Then when that's dry just some good old fashioned dry brushing/highlights with a silver enamel paint.
thanks for the comments!!!!
Now all I need is a helmet, some boots, armour, backpack, gaunlets, jumpsuit........................
Respect
P.