Dome Bumps

Here is another detail from the screen used R2D2. The builders club refers to them as Dome Bumps.

Here is a closer view

So to copy this detail, I picked up some furniture foot pads from my local hardware store.

Sand the feet covers lightly to rough them up, and then paint them with the same blue paint as the rest of your trim.

Once they are dry pop them in the holes from the inside, and use a little hot glue to keep them in place.

HERE IS THE END RESULT