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Considering this, does muriatic acid etch aluminum?
Muriatic Acid to Clean Aluminum. Muriatic acid, or hydrochloric acid as it's also known, is an extremely harsh acid that's sometimes used in the industrial world. Homeowners sometimes use it to clean and etch aluminum surfaces. Muriatic acid cleans and etches aluminum.
Subsequently, one may also ask, does phosphoric acid etch aluminum?
Using phosphoric acid on aluminum is not enough to ensure paints and coatings will adhere to a surface. Using phosphoric acid on aluminum by itself produces very little change to the surface. To ensure the tough oxide is removed from the surface, a Vanchem product designed to clean, etch and coat aluminum is necessary.
Etching aluminum with Ferric Chloride. Ferric Chloride is a great substance! A lot of people have it, cause it is used to etch PCBs in DIY conditions. Aside from eating away copper, FeCl3 reacts with a lot of metals, but is harmless to most paints, even paint from a gel pen or a CD marking pen, or any alcohol based pen