I'm surprised by the mess aluminium sheet cutting and grinding creates: a lot of saw dust and you don't want to have much of these particles floating around and piling up.
The excess dust can form a dangerous mixture in high concentrations, especially in combination with metal particles. Sawing and grinding aluminium is all times kept separate from my 'Hot Metal Workshop'. A flame or spark initiating a 'pile of wild formed thermite' would be a matter of time.
I love my studio too much for taking such risks. The future is bright enough, there's no need to burn my studio. :)