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.
Vinegar can be used to clean concrete. A simple mixture of warm water and white vinegar is enough to clean everyday dirt from concrete. Mix equal parts warm water and vinegar together and apply to the concrete. Allow the solution to sit for several minutes before wiping down and rinsing.