Trim the tree with a rainbow of marbled ornaments. We used plain ceramic ornaments but you could also use glass ornaments. The paint will just appear fainter on the clear surface. Try using a mix of shapes for unique marbleized ornaments, which double as pretty Christmas package toppers.
Work in well-ventilated area and cover surfaces with newspapers. Fill bucket with water to within 2 inches of rim. Tape over ornament's metal cap and tape ornament to the dowel. Set aside.
Holding paint cans 8 inches from water, spray each color onto water at a 35-degree angle for four to five seconds. Overlap colors. Immerse ornament gently into the bucket, rotating slowly through the surface paint rather than dunking it straight in. When paint forms a skin on top of water, push it away with the stirring stick; remove ornament and hang to dry overnight. Clean paint away from water surface with the stirring stick. Repeat for each ornament.
Remove tape, and spray ornaments with acrylic sealer. Add a gold cord or ribbon and hang.