My original plan was to refinish it and put it out into the yard as your typical bird bath. However, my plans quickly changed and I decided to turn it into a small patio or porch table. The reason I decided to do this was two things: it's on the smaller side and second...it has a flat bottom (in the bowl portion) which makes it a great table!
At Lowe's I picked up 2 cans of outdoor spray paint that has that textured rocky finish to it in a natural color. I forget the brand but it's really nice spray paint at $10.00 a can. I also picked up 1 can of clear acrylic sealer at $7.00 a can.
We left the pieces dry for 24 hours out in the sun and then sprayed them with the clear acrylic sealer. I only used one can of sealer because the new bird bath table will be sitting under large front porch where it is partially sheltered from the elements. If you are sticking it out into your yard, I would suggest adding 2-3 coats of the clear sealer to it.