Final answer:
To remove nail polish from sidewalls, a cotton ball soaked in nail polish remover should be used for a precise and gentle removal.
Step-by-step explanation:
To remove polish from the nail sidewalls, the best option is to use a cotton ball. The emery board is too abrasive for the skin, your thumbnail may not be effective and could lead to uneven removal, and the orangewood stick is typically used for pushing back cuticles, not for polish removal. Instead, soak a cotton ball in nail polish remover and gently wipe the polish off the sidewalls. This method provides a precise and gentle way of removing leftover polish without causing damage to the surrounding skin.