Chris Breier: How to clean dried acrylic paint from brushes
How to Clean an Acrylic Paintbrush (video) - will kemp art school
Acrylic Painting Tips for Beginners
Buy U.S. Art Supply 12 Hole Multi-Function Plastic Brush Washer, Cleaner and Holder with Palette Lid - Clean, Dry, Rest, Store, Hold Artist Paint Brushes - Cleaning Acrylic, Watercolor, Oil Painting Online