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Gently move the torch back and forth down the length of the bamboo until the desired color is reached.  Work in 6-inch sections, and turn the bamboo as needed. Work all the way around before moving on. Finish with a wax paste to add shine to the bamboo and preserve it.

Summary:
Treat bamboo with heat to give it a darker look like fresh coffee. Drill holes at various spots down the length of the bamboo. Toast the bamboo with a handheld torch. Finished.