Why on earth use anything but the tried-and-tested, usual mylar films that are so very often written about in these pages in many threads?
I know you weren't asking me, but I'm going to reply anyway.
- I don't have any Mylar films on hand — not now, and never did.
- I strongly believe a hallmark of intelligence (from a cognitive science perspective, and not as a veiled insult to anyone here or elsewhere) is being able to adapt and/or utilise what's immediately and/or readily available for oneself.
- If I have to personally 'work on' a nib I own, that would mean it — as a non-living, unfeeling, inorganic and material possession of mine — has at best failed to meet my expectations of it as a product or tool, and at worst incurred my displeasure or ire. The last thing I would care about doing with it would be to treat it tenderly and/or as if it was a valuable or worthwhile object. If my bedroom door somehow wouldn't budge when I tried to open it or move it out of my way, I'd shove it; and if that didn't get my outcome or at least displace it, after two minutes of fruitless troubleshooting I'd kick it down (and have done so before; it cost me more than the price of a good pen to replace properly).
Finish off your work with those natty buffing strips that cost just a few cents each?
I've done that before, many times over. I also bought a whetstone, similar to what the O.P. showed, specifically for the purposes of reshaping nibs — either to my liking, or to ruin and oblivion — that I don't like; I just haven't felt annoyed enough to use it yet, since I snapped the gold #10 FA nib on my Pilot Custom Heritage 912 with my fingers in anger a couple of years ago.
<Risk> is not something I wish to introduce anywhere near any of my valuable, flexible nibs...
Then please don't, for your sake.
I don't consider any 'flexible' nibs I have to be either precious or more pleasing than their not specifically (and not particularly) flexible kin; and any nib I own that displeases me would fall a long way down in the hierarchy of what I consider valuable to me. Heating it in the flames of my gas stove and then hitting it with a hammer would not decrease its value to me; but actually 'working on' it with a Micromesh pad, emery board, or even a whetstone would be giving it a chance not to end up in the garbage bin but actually be useful.
and take note of what one particularly well-respected expert has to say, above (Ron Zorn)...
I understand not many others here are as ready to tell their pens and nibs to "shape up or ship out", but I personally am, especially if and where salvaging or partially recouping the price I paid for a pen is not worth the hassle of selling it. That's how I usually think of cheap pens, Chinese pens (and, for disclosure, I'm Chinese and grew up in Southeast Asia), pens with old brand names but of questionable production quality these days (including Parker, and I'll find out shortly about Cross), or even something like a gold Pelikan M8xx nib that failed to perform nearly as well as its steel M200 kin. Whereas I wouldn't even dream of 'fixing' a gold Sailor or Platinum nib by reshaping the tipping or taking off any material with Mylar, Micromesh, a nail buffer or emery board, let alone sandpaper or a whetstone.
As always: 1. Implicit in everything and every instance I write on FPN is the invitation for you to judge me as a peer in the community. I think it's only due respect to take each other's written word in online discussion seriously and apply critical judgment. 2. I do not presume to judge for you what is right, correct or valid. If I make a claim, or refute a statement in a thread, and link to references and other information in support, I beseech you to review and consider those, and judge for yourself. I may be wrong. My position or say-so carries no more weight than anyone else's here, and external parties can speak for themselves with what they have published. 3. I endeavour to be frank and truthful in what I write, show or otherwise present when I relate my first-hand experiences that are not independently verifiable. If it is something you can test for yourself and see the results, I entreat you to do so.