Use your Cricut or other cutting machine to make a vinyl stencil. All the details on how to make a stencil are in the full tutorial
Tape off the rest of your tumbler to keep it safe from the citri-strip gel.
Apply a thick layer of Citri-Strip over the Stencil and let it sit and work its magic
Keep and eye on your tumbler. When the paint starts to bubble it is done.
Learn more tips for crisp lines