I just want to share the results of an unfinished wood box done in 2002. The base coat was either black gesso, or McCloskey's Special Effects Metallic glaze, or acrylic metallic paint sponged or brushed in various places. From there, as MaryJo said, plain old embossing as with paper worked for the rest of the detail. Some areas were colored with light-body acrylic paints.
The only part that was sealed was the lid -- painted over the black gesso with a primer/sealer. It gave the lid a nice sheen, but not too glossy.
Elements of Zia Slideshow
Specifics