I don't know about you, but I always take my best watch off when working in the yard or doing something that might scratch it.  Instead I put on a junk watch so I don't keep looking at the hairs on my wrist.

But when I moved, I threw caution to the wind and in the frenzy of all the disassembling, packing and cleaning I scratched the crystal repetively until the watch was also junk.  Noting that the crystal was special and had a section of it magnified, I realized that finding someone to replace it would be impossible.  I bought a new watch instead.

Later on I decided to try buying some PolyWatch. Within a few minutes the crystal looked new. The PolyWatch took all of the scratches out except for one.  That one was deep enough that it can be felt with a finger nail.  The watch has to be held at just the right angle to see it.

I was very impressed with this result and I am back to wearing my original watch.
All I need now is for someone to invent PolyWatchBand and it will be perfection.