This brush cleaner provides gentle cleaning power that will not damage synthetic or natural brushes, yet effectively and thoroughly removes oil, alkyd and acrylic paints, as well as paint mediums. It can repair many brushes that have been damaged by dried paint (if the filaments are intact). The product is also suitable for cleaning painting and palette knives. Avoid contact of varnished or lacquered surfaces such as brush handles as the cleaner may remove the finish.