I recently bought an intricately laser cut 3D bare chipboard christmas tree and yesterday I had a go at decorating it.
I started off colouring the whole thing using a distress stain (peeled paint). Then I used various distress inks (shabby shutters, crushed olive, bundled sage and forest moss) all over it to create a less "solid" colour - lots of texture and subtle variation in colour.
I found a couple of old metallic ink pads that were beginning to dry out a little, and they were ideal for dabbing around the edges to add little hints of gold and copper
Finally I sprayed the whole thing with a gold perfect pearls mist and then painted the star gold using acrylic paint.
I have some little mini bells that I want to tie to the branches but don't have suitable ribbon/cord yet. I'll take another photo once I've been shopping ...