Good evening, everybody!
First a note on behalf of the leather gloves: I wrote to several online-medieval-larp-shops, because they usually don't put that much information on their websites regarding specific measurements, but I did't get any response. Will try to call some of them (if they have a phone number...)
Anyway, my top candidate right now are "suede" while the ones I previously used are smooth leather...I anyone has any idea what the real props were, please tell me. When I started making the gauntlets I just looked for affordable leather gauntlet gloves...

These look very promising and the description says: "ideal for swordfighting" (translated from german) ;-)
They are also in the same price-range as the ones I used before. I will call them tomorrow regarding size-information.
OK, now on to what I have done today and also answering the questions about how the edges look with the fiberglass cut.
...To be honest, I wasn't entirely sure if the fiberglass would show or not, but after cutting and cleaning a few parts today, I'm really confident, that the new way of laminating the parts will look in any way different than the former method. But see for yourselves:

Cutting on the bandsaw with my new contraption works quite well, but I have to trim a few millimeter from the actual edge and sand down the rest with my belt-sander. After that i just gave it a quick steel-wool polish and in my opinion the parts don't look any less metallic than before.

Comparison: LEFT: just trimmed with the bandsaw RIGHT: sanded edges and steel-wool finish.
They will of course look even better when aged a bit, like my pair of gauntlets in the background.

For those of you, who want to have the kit... this is basically the complete Assembly in an exploded view! ...I might make it a bit more "step-by-step" for you, though ;-)
I never really had an overall plan written down of how to assemble the gauntlets, but I need to check my supplies and maybe re-order some rivets and therefore need to know exactly how many parts of what kind I need for each pair. Of course I made a material-list to calculate the price before starting this run, but not this detailed or visualized.
I have to work tomorrow, so can't be in the Shop as long as today, but can do a bit of work in the morning.