A few photos of my solar wax melter were placed in the 'briefcase' section of my yahoo profile today.
I use cheese cloth for the "filter" and I ran the wax through twice to get it as clean as you see in the final photo - ready to make candles now. The used cheese cloth makes for an excellent fire place starter.
I also put about an inch or two of water in the catch pan. The wax floats on top of the water and becomes solid there (after cooling) and the water makes it easy to remove the wax cake.