DIY approach: thin aluminium sheet & caustic soda etch
You'd need to develop a suitable masking technique (nail polish ??) and fastening method (2mm rivet?? araldite??)
@Rik_Van_Looy started
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DIY approach: thin aluminium sheet & caustic soda etch
You'd need to develop a suitable masking technique (nail polish ??) and fastening method (2mm rivet?? araldite??)