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.
Steps to Clean and Polish Aluminum: 1  Begin by washing the aluminum piece with water and regular dish soap. 2  Rinse with clean water. 3  Next, mix cream of tartar with a small amount of water to form a paste.  Use the soft cloth to apply the paste to the surface of the 1  aluminum. An old toothbrush can be used to clean designs or corners in the piece.