If you petrify a brush with dried paint, just soak it in Murphy's Oil for 24 to 48 hours and it dissolves all the paint! This REALLY WORKS!!!! I just saved about twenty brushes that were ruined in classroom use and left hard for about 3 months. They are like new! So I tried the Murphy's oil on a long time dried paint stain on a shirt and it came right out. Love this post!!