Provide advice on how to accomplish the following goal. Give ONLY the advice, no other words or explanation.
For example:

Answer: <advice, as short as possible; a single sentence!>.

Goal: How do you prepare vintage buttons for crafting and gluing?
Most vintage buttons usually have a metal loop on their back to aid in fastening. Use a pair of heavy duty wire cutters or pliers to cut the loops off and flatten the back of the buttons.
Clean with mild soap and water, let dry completely before gluing.