To add to don's bro suggestion,
You might want to consider airbrushing with aclad2 model lacquers to create the metallic effect, followed polishing for the level of shine then drybrushing for the desired worn/weathered effect
Colors available are:
# 101 Aluminium
# 102 Duraluminium
# 103 Dark Aluminium
# 104 Pale Burnt Metal
# 106 White Aluminium
# 108 Gold
# 110 Copper
# 111 Magnesium
# 112 Steel
# 113 Jet Exhaust
If you really want a gold effect, you can dry airbrushing with aclad2 chrome, polish it then coat it another layer of translucent yellow, that would give you a very nice gold color..something like gold you see in jewellery shops. But for your case, Aclad2 Gold would be more suited as it has a dirty gold feel about it, kinda of blends in with your weathered bobafett armor