Now that we have this selection, let's save it to the Alpha Channel so we can use it again later - we'll be needing it. In order to use this selected area as our metallic button, it needs to be on its own layer. Right click on this layer in the layer palette and choose either Properties or Rename and rename this layer Left Button. Click on the glasses next to the layer's name to toggle its visibility off. Click on Layer 1 to make it the active layer again.
Flood fill the selection with black.
We'll want our button hole to be black later for the rollover effect. Now let's make our right button in exactly the same fashion we used for the left. Now save this selection to the Alpha Channel and name the selection rightButton. Toggle the layer's visibility off and click on Layer 1 to make it active. Flood fill the selection with black, then deselect.