If you want your creations with liquid chalk markers to be permanent you’ll have a lot more choices in the media with which you work. When you choose a porous surface the markers will be permanent rather than erasable. Some of those surfaces can be: Porous chalkboards Cardboard Paper Untreated wood Sidewalks Concrete Most painted walls Fabrics and clothing Cork Carpet and Rugs All these porous surfaces are ideal media if you want your art to be permanent. You will be able to create permanent signs or artwork in vivid colors that won’t fade. Liquid chalk markers are practically mess free, too. All you need do when you are done is replace the caps and put the away the markers! Examples of Non Porous Surfaces can be found here.