Deejay, we have a fairly detailed thread on cleaning aluminium:

https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=30589&Searchpage=1&Main=6321&Words=%22oven+cleaner%22&Search=true#Post30589

Oven cleaner eats away much of the crud, but oxidises the metal. I think there are better alternatives.