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.
Undiluted white vinegar can be used to both polish and clean your stainless steel flatware. Heat stains can be removed by gently rubbing them with vinegar. To remove streaks from your flatware, gently rub it with olive oil or club soda. Polish dry with a soft cloth.