quite some years ago I used to by electronic magazines and some usefull tips where given in them. anyway one tip I remember which I want to do now but have forgotten the process? The process involved dipping aluminium panels in caustic soda for a few minutes whereby it gave the surface/facia a very hard resiliant surface,almost none scratchable.
Does anyone know the strenght of the formula and time to keep it in the caustic soda?
Thanks