BACK-SET by RoMix states it will do the job.
The best way is to send it off to someone like Southern Water Treatment who uses specialized chemicals that do not harm the aluminum substrate. They are located in Kentucky and have cleaned walk boards and heat exchangers. It is amazing what they can do.
Clean this off with water and a cloth rag or a brush.
soap, water, scrub
To remove both oil and grease you should clean aluminum with a solution of water and mild dish washing liquid. Generally, aluminum items around your home just need a good periodic dusting with a soft, clean cloth, to keep clean and shiny. Thanks!
Scrape off what u can with a razor blade. White vinegar should remove what's left.
A good degreaser should work. Also, look into muriatic acid, that is supposed to be a good concrete cleaner.
Rub with aluminum foil.
Check with your local hardware store or Home Depot/Lowes etc. There is a special chemical that is supposed to clean everything from concrete.
The best way to clean garden furniture is with a hose and some dish soap. If it needs scrubbed, you can scrub the soap in before spraying it off. This article will give you 5 easy steps to clean your powdered aluminum furniture - http://www.ehow.com/how_4899759_clean-powder-coated-furniture.html
There are a few ways one can remove wood stain off of concrete. One way is to use a sandblaster to remove the stains. Another method is using wood bleach, water, and a scrubbing brush.
Dry Ice blasting
No most muriatic acid no matter its concentration has a chemical reaction with aluminum that gives off H gas.(i have only tried it with Aluminum foil but dont know if it works the same for all Al) Try not to mix the two.