Like the man said, never use an angle grinder for soft materials like aluminium. It will jam in the cut and either shatter the blade or fly back at you. Either way the consequences could be nasty.
Cutting by hand with a hacksaw needs a coarse toothed blade 12-10 teeth per inch and kero for lubricant. Petroleum is not recomended as the heat generated by the saw could ignite it.
Retired Fitter
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