I want to have new aluminium discs water cut to my own size and pattern, but I do not know what grade of aluminium to use. The maker of the original discs was very guarded, only commenting that I should not use 7076. The discs only see low heat and the pads are Poly Matrix Q ceramic compound. The discs need to be hard anodized, so the aluminium has to be one of the grades best suited to anodizing. Has anyone any experience of aluminium discs?
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