How to Keep Your Acrylic Paints Wet - Instructables
Tamiya Paint Retarder Acrylic (40ml) - Magic Stronghold Games
Homemade Acrylic Paint Retarder Recipe - Textured Art Magic - Love Acrylic Painting
Amazon.com: U.S. Art Supply Acrylic Retarder Liquid - 4-Ounce - For Slowing Dry Times of Acrylic Paint for Pouring - Gives you more working time with your Pour : Arts, Crafts & Sewing
Acrylic Retarder to Fluid Color and Dry the Color Slowly, 250ml