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.
Preparation. 1  Use an approved scrubber pad. 2  Rinse the aluminum with water. 3  Use the Prep Pad and diluted Aluma Prep solution to scrub gently with the grain to remove chalk, oxidation, dirt and any mold etc.  Rinse with fresh water until the water sheets off of the 1  metal. Wipe dry with microfiber cloth.