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FranOnTheEdge wrote:

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How do you paint a UVMap of the chrome handle?

You don't.

Chrome has no color. It's about reflection. Reflections are achieved by either using environment maps (standard bitmaps or HDRI bitmaps) in a renderer that supports environment maps, or by actually modeling the environment that is being reflected, and setting objects material to a high level of reflection.
Most likely the former is this case. This is where the distinct difference between a "texture map" and a "material" comes into play. Chrome won't have a "texture map", only a solid color material (either completely black or white depending on renderer) with a "minmum reflection" setting that is pretty high.

The handle still needs to be UV mapped. (the act of placing the mesh's UV coordinates in texture space..which the UV editor "looks at", just as the standard geometry window "looks at" object space).

Again (haven't we had this discussion before?), "UV mapping" is completely different from a "texture map" (2D bitmap APPLIED to the mesh USING the 2D coordinates (points) created during the UV mapping process).
You use Wings to create a UV map (which just happens to apply a checkerboard "texture map" so you can check for texture stretching in your UV map layout.)
You use Photoshop/GIMP/you pick the 2D app to "paint" a "texture map".