Duncan OSKIT-4 Acrylic Paint Set, 12 Best Selling Colors in 2 Ounce Bottles with Free How To Paint Ceramics Book Set of 12 best selling Duncan Opaque Acrylic Paints with free How To Paint Ceramics Booklet. Duncan Acrylic Paints provide solid coverage for your pieces and are water-based for easy cleanup. Great for use on unfinished ceramics, wood, canvas, plaster and other porous surfaces. Can be mixed together, great with stencils, sponging, dry brushing and other decorative painting techniques. AP Certified Non-Toxic. Not safe for use on food containers. Made in USA!