Paint disappears?

Every time I use the paint tool on the ground. I save the game and when I load it disappears. Also, is the paint unlimited in Gmod? Or is their a limit?

Unfortunately, the Source engine doesn’t save decals (paint, bullet holes, blood, etc.). If you’re depending on it for a pose or whatever, you’ll have to manually paint it all back on.

Paint itself never “runs out,” but there is a decal limit. I think it’s dependent on your computer.