Hello,
I have this Omega watch with a stained dial. It's not the kind of "patina" I find particularly appealing so I wanted to see if I could clean it up with the usual soapy water but nothing happened... Then, by chance, I bought the exact same Omega dial for a couple of dollars at a flea market, with the same kind of discoloration (I also scored another omega (354 bumper) in the process, I'll clean it up and give it to my dad). So it was time to experiment !!!!
Before picture :
All 3 methods were applied with a Q-tip (cotton swab), gently rubbing the cleaning solution on the dial, and rinsed VERY WELL using distilled water.
First up : more soapy water, with different soap concentrations... no change.
Second : lemon juice diluted in water, increasing the lemon juice concentration slowly... no change
Last : Windex (ammonia based window cleaner) MIRACLE !!!! It took about 30 minutes of work to get this result, doing one little portions of the dial at a time. I chickened out around the writing on the dial, so it doesn't look as good as other places. I didn't want to push my luck.
After picture :
Share any method you've used and before/after pictures.