Hello
After some PM , here is my contribution.
Thank you to LOL for his comment .
Well , about the glass , No special secret for this.
It s a security glass. Two glass with glue on the middle. The glue are dead ,and now have a beautiful brown color.
You need to remove the glass from the casting , and put them in Acetone. For a long moment (some days) if you can’t separate them easily. But since the glass is fully brown , I think that you will be able to separate them before to clean them with acetone.
-For remove the glass from the casting .
After , use a Dremel for remove all the glass putty. Remove kindly the glass. Try to separate the 2 glass. If nothing move , don t force !
Put the Glass in a tank with Acetone and wait .
Me, I use a closed tank , Glass and acetone inside, and I put the tank in an ultrasonic cleaner . And after some hours , all the glue is gone .
When the two glass are separated , clean them , put them together , use Silicone for bathroom all arround and wait 24h for be sure that is dry.
If you don t use silicone , when you will put it in the casting with the galss putty , the oil in the glass putty will gone between the two glass .
It s a long job , but you can save the original glass .
If you have more idea , please post your solution. And if my thread is hard to understand with my poor English , please update it with the good language !!
Stéphane