How do you clean fingerprints off of a soda can?

Answer 1

Fingerprints that are from casual contact on an object (not in blood from a crime scene) usually result from skin oils on the surface of the object. In some cases the print results from acidic compounds actually etching the surface because of acids present in the sweat.

In the first case the prints may be removed by direct friction with a clean cloth. This is common in crime dramas where the suspect "wipes the room down" to remove prints. For glass and other glossy objects to be used in picture framing, display cases or science experiments using ammonia solutions or even Windex or similar cleaners will ensure a clean surface. Acetone may be used but it has toxicity and flammability problems that may be of concern. It is suggested that the object be soap and water cleaned first for gross contamination, then cleaned with the specialty cleaners.

For etched in prints on aluminum, silver or copper or similar a commercial polishing compound will remove the corrosion.

In either case hold the object being cleaned by its edges or with cotton gloves to avoid laying down more prints as you clean.