On Wed, 17 Apr 2019 11:20:32 +0100
Roger Mills wrote:

The prescription specs which I use for computer-based activities have
a scuff mark about the size a finger-print from a little finger on
one of the (plastic) lenses.

Whilst I could buy a new lens for £30 or so, I've been trying to
polish it out on a DIY basis.

I found jeweller's rouge very effective at taking the scuffs out of my
favourite sunglasses where they had fallen out of their case and slid
around in the glove-box.