This is about what is necessary to indulge in rock painting using what is called puff paint. First of all, it can be said that "Painting" with puff paint ( Tulip Glow™, Slick™ Scribbles™, or Glominex™) is more like trying to control the flow and application of products like Elmer's™ glue. It will dry quickly and smear easily. Naturally, when squeezing the product through a nozzle, one must take into consideration that the nozzle will clog and has to be cleared constantly. This is done by using either a paper clip, plastic toothpick, or sewing needle.
The next thing to consider is how to hold and squeeze the container. Squeeze bottles, no matter how large or small must be treated gingerly. Press with the thumb and forefinger like you were gently pinching a cotton ball. If the paint blobs out onto your rock, you may have squeezed it too hard. If it spits out a small blob, you may have hit an air bubble. ALWAYS tap the bottle upside down on a hard surface before starting the process.
Now if you accidentally bump your hand or anything else against the paint, use a q-tip to remove the excess paint you left on the rock by "slowly rolling the tip" over the area you want to remove. This will make it easier to reapply the dot or line you want to put down. Admittedly, the lower the amount of paint left in the bottle will dictate the effectiveness of even your best skills at applying lines and dots to your finished piece. Remember to always keep the nozzle clean with a needle, and keep the paint tamped down towards the opening of the bottle. The final product ( your rock ) will look so cool with texture, color, and glow-in-the-dark features. Good luck and stay with it!