Fimp,personally I wouldn't use aluminium for the bands,all bands on can's are either stainless or Ti cause their purpose is to act like a clamp around the skin to keep it tight on the end cap,.8-1mm stainless is fine. On a carbon can you should use a smear of copper,red or black silicone around the end cap before pushing the skin into place,this takes some of the load off the rivets & there's less chance of the carbon wearing loose because of heat & vibration.
Cheers