Impulse bought metallic orange from vallejo today(vallejo premium, 62.043 if you need to know) as i realy liked the colour, it is water based and it can be used whit a brush or airbrush

, but it was only when i arrived home that it struck me; i have no idea how to shade it as i have never painted orange before.
so any tips?
all i can think of is
gw nuln oil, but i feel it will make it look muddy, too dark and dirty.