Video from Cambodia depicts a man whose face was burned and disfigured with acid. He looks as if acid melted his face, and it then solidified after forming bridges with chest and shoulders, eliminating the neck.
Burn marks can be seen all the way down his torso. He also appears to have difficulties closing his mouth, and probably lost all or much of his eye sight, due to acid getting in the eyes, and/or damaging eye lids.
Props to Best Gore member @BenjaminLuckyTroubleMaker for the video: