Homebrew PCBs

Hi all. 

I am looking in to paste screens. I have found some 0.2mm ( 8mil ) thick aluminium sheet that I can work with on my milling machine. I was wondering if 0.2mm is too thick for a screen and if aluminium was any good as a material. It seems quite nice and certainly strong enough for prototype screens. Not sure about cleaning and life of the screen but got a feeling it isnt bad. 

I dont have any paste at the moment so I can  not do any tests myself. 

Thanks all

Trev