Go to Hobby Lobby or some place like it and pick up some gold foil adhesive.
It's usually in the craft section with all the fake gold and silver leaf.
I've used this stuff to apply zimmeret to a tank I built once. First and only
tank as a matter of fact.
The armor guys I know all freaked out, now they all use it too.
Last time I was at the local model shop/hangout they had several bottles
in stock so I guess it's catching on.
It's very much like elmers thinned down but seems much more tacky.
I used it on a Cutty Sark th do some of the copper, worked well.
Sluggo