Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to apply spray on nail polish [title] Remove old nail polish. [step] Use nail polish remover and a cotton bowl or cloth to remove any polish you already have on your nails. Make sure to remove all of the polish.

Ending1: Then, fill the bowl with water until there are no more water in it. Put a q-tip or cotton ball inside the bowl and rub the tip in the water. Ending2: [title] Apply acetone on both cuticles. [step] Dip a cotton ball or cloth in acetone and apply to both cuticles. Ending3: You should also use a cotton cloth to pour rubbing alcohol on the polish. [substeps] While rubbing alcohol can strip your nail polish, rubbing alcohol alone will leave your chipped, peeling surface flawless. Ending4: Once the polish is removed, clean your nails with warm water and soap. Then, dry them thoroughly with a towel.

Answer format: ending1/ending2/ending3/ending4