Fill a disposable plastic container 3/4 full with room temperature water. The container must be deep enough to submerge the entire ornament.
Pour nail polish gently into the water. The more polish you put in the water, the more coverage your ornament gets, though too much will give your ornament a clumpy finish.
Gently stir polish with your stir stick to make a marble look on the water.
Wearing gloves, dip the ornament entirely into the water and swirl.
Hang ornament to dry.
Recipe by Lauren Mancke at https://laurenmancke.com/marbled-ornaments/