Ornaments can be finished in a wide variety of ways - limited only by your imagination.  I have used acrylic paints, diluted paints, waxes, polyacrylic spray - to name a few methods.  I have also decoupaged punched snowflakes and newspaper onto gourds. 

Detailed using paint pens and decoupaged with newspaper.

Painted and/or embellished with sequins, ribbons and decoupage snowflakes.

To hang ornaments, I attach a threaded eyelet hook and use either fishing line, jute string, ribbon or ornament hooks to hang them on the tree.

Stained with diluted paint and/or tinted wax.

Left natural - finished with polyacrylic spray.