This is absolutely incredible stuff.  I used this on my 1980 Rolex DateJust acrylic crystal.  It cannot be used on sapphire crystals as they are much harder and this simply will not work.

In the case of my Rolex, I followed the tube's directions - put some on the crystal, some on a lint free rag, and rubbed it for 1-2 minutes.  It removed EVERYTHING off the crystal as far as scratches and scuffs.  Everything.  I was literally going to go spend $99.00 to have some Rolex dealer do this - they probably use the same thing!

Spend the money, do not hesitate.  It will cost you less in GAS going to get your watch fixed than buying this product.  In the end, your watch crystal will look brand new.  If it works on a $3,000.00 watch face, surely it is worth the money.

If your watch cost more than $3,000 and is not a pre 1990 Rolex - it probably has a sapphire face and you are not reading this right now.