How to cut aluminum plate?

mopowers said

Thanks for the input guys. I ended up using a chop saw with a carbide tipped wood blade. It was noisy as hell and sent chips everywhere, but it cut the 3/8" plate like butter.

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Yes that's how it's done. You cut aluminum just like cutting wood. Skil Saw, Miter Saw, Table Saw, Router. All with carbide tipped blades and router bits. You can put a very small amount of A-9 on the aluminum for improved finish (especially when using the router).