Review on 🎨 Vibrant 24-Color Acrylic Paint Pens: Ideal for Rock, Stone, Ceramic, Glass, Wood, and Pumpkin Painting. Perfect Art & Craft Supplies for Kids and Adults by Doris Tran

I bought cave painting diplomas with my grandchildren. We used a light gray smooth river stone. Some of the colors were as expected, but most were too transparent to see the color. I understand some will paint the stone with a white primer, but even that won't work. Maybe my set was just oil? Even shaking didn't help. Didn't know how long the corona would last when I bought it and past return date before I could use it for the last two nights. This check requires purity and thickness. The normal thickness of the paint lays down evenly. Transparency is so transparent that it doesn't even show color.