Great white sharks. Trophic Pyramid Information that is in video: An ecological pyramid (also trophic pyramid, energy pyramid, or sometimes food pyramid) is a graphical representation designed to show the biomass or biomass productivity at each trophic level in a given ecosystem.
The risk is that you may not be able to remove all the acid and if it is left on the metal it will continue to corrode the metal. So to give you a quick answer, you can use vinegar to etch the aluminum, but you have to rinse the surface thoroughly to remove all the acid residue.
To protect aluminum cookware from discoloration, never wash it in a dishwasher or let it soak in soapy water for long periods of time. To remove interior discoloration, fill the pan with water, add 1 tablespoon cream of tartar or 1 tablespoon lemon juice per quart of water, and simmer until the discoloration is gone. Complete the process by scouring the pan with a steel-wool soap pad. Caution: Wear rubber gloves.