Late last week, while enjoying wearing the vintage Longines recently acquired from LesXL, I did that which is evil.
Anticipating a Texas "Norther" forecast for the region (otherwise hyped as a "Polar Vortex" by media), I replaced a cover over a hydrant after preparing a heated water bowl for backyard birdies. During the effort, the watch had oriented itself on the outside of my left wrist because I was wearing it loosely. The crystal snagged cruelly against the brickwork while adjusting the hydrant cover, resulting in a dreadful scuff with a deep scratch.
Working the crystal over with Mother's Mag Polish over a couple of days time, followed by a final polish with PolyWatch made the crystal whole again, if somewhat thinned so I am pleased to wear the watch to town for several engagements.
All better now!