Melt beeswax in a baking pan over low heat. Melt the wax slowly so you don't burn or scorch it.
Stir in pigment. When the wax is melted and thin, add powdered pigment and stir. Keep adding pigment until the wax is the desired color.
Remove the pan from the heat. Wear a glove-style potholder so you don't burn your hands. Allow the wax to stiffen slightly.
Apply the wax to the wall using a plaster trowel. Dip into the wax with the edge of the trowel and place the wax on the wall. Form the wax into the desired shape or texture.
Reheat the wax as needed. When the wax begins to clump or harden, reapply heat until it is thin enough to work with.