looking on the net ive found sheets of 2mm NS4 Grade Aluminium at 500mm x 500mm for under £20, How good is the NS4 grade and how good is that price, and more importantly is 2mm strong enough or do i really need something thicker.
I was reading an older post on here about polycarbonate and how drilling causes microscopic cracks etc etc, and its kinda put me off polycarb, aluminium must be much simpler to work with, and stronger ?
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