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Does anyone know if a patina finish can be put on either of these using fire or acids? I don't want to use paint. thanks.

I don't know the tricks, but why not try a google search?

Thanks for reply. I did hours of research before posting but have not come up with anything I could use.

Copper sheeting will offer color changes with heat and acids. But tin (besides rust) and aluminum can be altered with texture (hammer, punch, press), but any color change would be a paint or stain.