Yes, acetone can be used to remove hard wax. It is an effective solvent for removing the wax residue that may remain on the skin after waxing. However, it is important to use caution when using acetone as it can be harsh on the skin and should not be used on sensitive areas or open wounds. Additionally, it is recommended to use a small amount of acetone on a cotton ball or pad and to gently rub the affected area until the wax is dissolved.