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Polish the crystal yourself. Keep the crown. Don't dunk it in water and enjoy.
If you start at 800 or more it would be hard to do any damage. I mentioned simichrome and polywatch but toothpaste will get him started for fun but remember the polishes only work on cleaning up the fine scratches which is why you should work your way to the finest grit before you use it. By all means choose a junker and practice away. Always be careful not to sand bezels or other case parts. Although I really improved the lucite bezel on my Seamaster 300 166.024 doing exactly as I described.
Ok, and how do i polish the crystal?
just in case you need yet more re-affirmation...yes you have an interesting watch.
You are still going to have to use progressively finer pieces of sandpaper to remove the scratches. End up with 2500 then use your polywatch and you will be amazed. Still a great watch!!!