When I shop my local Goodwill, I always keep my eyes peeled for interesting, well made wooden frames. I love decorating with them, and they're so easy to paint and fit into any room. Just the other day I found this frame, almost 2 feet square, for $2.50!
I painted it robin's egg blue, because I had some left over from other projects. (Color recipe here if you want it!) Then I took this sanding block (best tool ever, pick one up at any home improvement store) and roughed up the edges.
After I sanded, I could see the raw wood peeking through. However, I wanted the edges to be a little more noticeable, so I used some antiquing polish (found at Michael's) to darken them.
I tried to get good photos of "before" and "after" to show you what a difference antiquing polish can make. Above is the before, and below is the after!
First, I used a damp cotton ball to apply the antiquing polish. This works well as long as you don't have too much surface area to cover. I let the polish soak in for about 10-15 seconds, and then I came along with a slightly damp paper towel to soak up the excess. Just repeat that until you get the color you want!