Zatatime,

two things:

- Aviation Consumer did thorough testing of various cleaners a while
back. Have a look at their site. Non-aviation stuff (for cars) always
has the danger of harming the aluminum, but they investigated into that

- Once you have it clean, we got great results sealing it with RejeX, a
coating similar to wax, but better, from the same guys that make
CorrosionX. The dirt comes off much easier with RejeX.

--
Thomas Borchert (EDDH)