Acetone is an Organic solvent. As stated it can be bought just about anywhere. Other post are correct in that it will eat most plastics. It will also eat many paints and other componds. The nice thing is that it evaporate extremely fast and for cleaning oils etc off can be applied very specifically.

Most nial pollish removers are a combination of alcohol and acetone so if you select nail pollish remover be wary.

i would agree that alcohol or one of the less agressive cleaners for a bow. If your more specific on your end use I can make recommendations.