[Tamar]

You can buff up the scuffed led with either burnishing cream or a bit of T cut..use a cotton wool bud..as they say buff on buff off!

Although this would make Mr Miyagi very happy there is an easier way to "resurface" the IR led's surface.

A good clean and  a simple drop of clear acrylic paint over your IR led will restore the surface to a perfect shine.

Hope this helps

With kind regards
Tamar