| These covered plugs can be reused many times to make holes in your rocks. It is time to remove the plugs when the rocks are almost hard . This keeps the plugs from sticking in the rocks.
The time between when the rock starts to get firm until it becomes very hard is called the green stage. Anything that you need to do the rock can be done when it is still green, this is during the second 12 hours. You can carefully scrape away that parts of the rock or divide it in two. You want to do it during that part of the curing called the green stage, but be careful you can break it. |
