I experimented on an old canvas that had previous dried other brand crackle and my texture mix, THIS TRI-ART POURABLE CRACKLE WORKED BEAUTIFULLY even on top of the old crackle but not the texture! It’s a smooth surface with deep crevices and has an eggshell shein when dry. And yes, the thicker the bigger cracks. I purposely made a few puddle areas to see what would happen and nothing but good things. I immediately bought another bottle cause I never want to run out of this. I prefer pouring and tilt with this right now rather than a knife, although a knife will give you more control of placement. Its consistency is like fluid paint used for pouring techniques. LOVE IT !