For the copper looking SBB logo, I would make small copper boxes, one for each letter. I would apply the same styles and filters to each, which is pretty much trial and error to get a metal look - you'll want to use the bevel and emboss features in PS to give it some 3D depth, and the Satin style for the shine (change the black default to white and see what happens).
To make the individual cut out letters, rasterize your shapes. Choose your font, and place the correct letter layer directly over the metal square layer in the position you want the cut out letter (no repositioning later). With the letter layer selected, go to Select>Color Range (2). Use the eyedropper over the actual letter to select the color. With the ants marching, click OK. Select the tile layer now, not the letter layer, with the ants still marching. Hit Delete. Looks like nothing changed, but if you move the letter, you'll see that the tile has the letter cut out.
Some tips - when working with multiple letter tiles, rename the layer to correspond with the letter that you want to cut out (So if you want "Smile" cut out, you'll need 5 tiles, rename each as "s tile," "m tile," etc. (1)) . Also, use a different color for your letters to make it easier on yourself when selecting the color range.
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