Hi,
Go to Edit > Edit Colour, in the "Model" field choose "PANTONE metallic coated" and you'll see the new colours: 871-877, 8001-8005 and 8020-8023.
For print, you can asign virtually any spot colour for a special, metallic one, the main conditions being to create a distinct colour separation and to tell to your printer office the corresponding, desired colour to use for that spot color. At least, I'm using this procedure with my printing offices for years and I never had problems.
Every day is a good day to learn something new.
http://romanianstampnews.blogspot.com/