Some APC are OK on the polished aluminum. The three basic types of APC are chemical, citrus and detergent based.
Example PB APC is a detergent based cleaner, and safe on most all surface even at 100%
That said polished aluminum can stain / cloud up very easy with APC or other strong cleaners. Of course this can be polished out, but who wants to go thought that work if you don't have to?
I use PB APC on a 10 to 1 and have not has one issue with it at that ratio. As suggested try and area to start with to see how it reacts on the metal