Question: How do you prepare rocks for painting?
Option 0: Wash stones with soap and water in a bucket.     Sand off any gritty parts with sandpaper if necessary.    Prime stones with one or two coats of acrylic paint or primer.     You can smooth Elmer's wood filler over a rock's holes, dimples, or cracks to even it out before priming.
Option 1: Wash stones with soap and water in a bucket.     Sand off any gritty parts with sandpaper if necessary.    Prime stones with one or two coats of acrylic gesso or primer.     You can smooth Elmer's wood filler over a rock's holes, dimples, or cracks to even it out before priming.
Answer: 1