Acetone can be used on stains caused by substances such as fingernail polish or household cement. Although it will not damage either natural fibers or most synthetics, it should be pretested to make sure that dyed fabrics will not be harmed. It should not be used on fabrics containing acetate. Use only pure acetone on stains; although most nail polish removers contain acetone, the other ingredients included in these products can worsen stains.