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 clean oxidized aluminum, scrub it with grease-cutting detergent, and soak it in boiling water, lemon juice, cream of tartar and vinegar. This 45-minute procedure requires rubber gloves, oven mitts, water, grease-cutting detergent, a stove, lemon juice, white vinegar, cream of tartar, steel wool, a towel and a sponge.