Shurely Shome Mishtake

[sssurfer]

Oh. So I missed this thread until now.

Polishing cloths will not work on sapphire, only diamond paste will.

Both polishing cloths and diamond paste will remove the rep AR coating in a snap.

Not an issue, as on PAMs the AR coating is on the inside only, so you are not going to touch it unless you remove the crystal out from the case and handle it carelessly.

3.5 micron is fine enough to give a polished look, no need to go lower.

I rather have a feeling that it will take ages for you to make the scratch disappear starting with such a fine grain. Most used technique is starting with some coarser grain (10-15 microns and up) to remove the scratch, then going down to finer grain just to polish the "foggy" effect left by the coarser paste.

But it naturally depends on the depth of your scratch.

And as it seems a rule of this thread going a bit out of topic too, here is my small contribute:

[TeeJay]

That'd be my guess too... but still an odd name and how it is the popular name for this garment

I thought most called it a vest

I quite agree, I blame the mentality that considers 'fiddy' an acceptable substitution for 'fifty' and turns it into a cultural movement