This one isn't mine, but I had the same knife (Becker BK-2)
Up-Armored in the exact same pattern maybe 3 years ago, and they use Duracoat. I'm not positive if they bake or not, I think they do, but as far as durability on a gun, I've put my knife through one Randall Adventure Training course over near Fort Payne, AL, and used it on four or five week-long camping trips before I got a malady in my foot that has just made that kind of activity impossible anymore, and there is only one area right in the middle of the blade where batoning (splitting) small logs wore on the coating down to the surface steel. It's certainly not wear-proof, but it is a much tougher coating than what came on that knife, or any other of the hundreds of knives I've bought and sold over the years.
Unfortunately (or not), Up-Armor doesn't do firearms due to the expense and hassle of shipping them back and forth. But it sounds like you want to do it yourself anyway, and I'm just telling you what I know about how well the coating can work.
I would think with the abuse the coating on my knife has stood up to, that the worst wear you might find on a firearm would be after a LOT of holster-wear. There are very minor wear marks from taking my knife in and out its Kydex sheath. You would have to be careful not to foul the mating surfaces of the slide and frame though, as the coating definitely would cause drag on the racking cycle.
It's a great product. If you end up using it (or Ceracoat), it won't count when you tell us about it unless you post some pics of it too. :biggrin:
Blues