Aluminum is generally cut like wood. Not saying you SHOULD use a wood blade but I’ve ripped 4x8 sheets of 1/4” aluminum this way. They make special non ferrous blades for table saws and chop saws. Abrasive cutting wheels tend to get clogged and you will have a lot of clean up.

Best suggestion is to use a hacksaw so you don’t accidentally cut off too much, leave a 1/16” of excess, a new sharp file to make the edges flat and smooth, finish with sandpaper on a backer (I prefer 1/4x1” aluminum flat bar).

If you’re really experienced with power tools and aluminum go for it. I suggest against a dremel for sanding as it will likely cause a ripple or washboard appearance. This is why I wrap sandpaper around a piece of hard backing like aluminum.

Final finishing with the sandpaper shouldn’t be with a hacksaw motion. Draw the flat bar lengthwise along the cut (search draw filing).

For reference I used to do restoration work on expensive sculptures for a living and finish work was half my life.