I use a long EXTREMELY sharp gasket chisel, but you have to be very careful about how it's used. Wire wheels and scotch brite pads do remove aluminum so I avoid them.
But, just like this one I have and wood chisels, they are sharpened only on one side for a reason. They truly are meant to be used upside down from what you would think so that they don't bite in. The sharpened side should be against the work surface and the flat side away from it.
That gasket remover works real well on plain gaskets, it eats the glue and like someone said - your fingers, paint and everything else it touches. Some guys say engine cleaner works too.....
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country