Well, right now I have some special aluminium soldering flux in the mail; check out the thread Aluminum soldering fluxes: The Way It's Meant to be Soldered :D for related info. I'm yet to decide what kind of solder to use among Sn63/Pb37 and Sn99'3/Cu0'7; I'm somehow leaning towards the lead free alloy, as it is said to work better on aluminium, though I don't know why.
