Let me tell you my experience with a scratch on my Tissot Seastar 1000...
I bought this Tissot cheap because it had a scratch on sapphire (and as the sapphire was dome and thick,genuine was expensive),I have decided to buff it out.
I bought the paste here
http://www.ebay.com/itm/diamond-past...item1e7803b0c0 ,great seller from Poland that sells shaving gear.
This diamond paste was intended to polish razors,but I have decided to try in out on sapphire crystal...
I found this tutorial (
http://forums.timezone.com/index.php...32539&rid=5666 ) and decided to try it.....
Wrong decision....
After I duck taped it,I have began polishing this scratch.....and all was great....I really polished it out...NO SCRATCH....
I removed the tape and washed the watch head with water....cold water came first and as the watch head was in my hands,it became hot...
When I looked at the crystal,I could clearly see the square that I have previously taped around and polished!!!!
(as the watch head was now cooler from the water,it had some condensation on the outside of the crystal)
What now????
I taped the bezel and polished the whole surface of the sapphire crystal to equal it....
At the end,it turned out great,but believe me,you will need a lot of elbow grease here,do not apply to much pressure on the crystal surface and polish it with small circular movements....
Good luck Paul