On the 110s I omitted the rivets for a few reasons.
First, I had thought about omitting rivets on one of my 190 skins, and asked people for a poll. Folks liked the riveted version better. I still had an interest in doing a skin without rivets, though.
Second, after looking at high-detail photos I realized you honestly cannot see rivets on the 110 unless you've got a magnifying glass. I also had a high-quality 48th scale model kit that was devoid of all rivet detail and if one of the best 110 models out there (Pro Modeler 48th Bf110G-4) decided not to put rivets on, that was another argument not to skin it with rivets.
Third, I couldn't find any references, anywhere, as to how the rivets might have looked on the 110. Not even the default 110 skin was any help in this area.
Fourth, I wanted to see if folks objected. 1 or 2 asked about it at the time, but there hasn't been much criticism for the lack of rivets. Now I know I can do a skin (as long as it's done well) and it doesn't have to have rivets on it.
If you can find any resources feel free to add some. I'd be very interested in seeing what you come up with (if anything).
EDIT: P.S. I take it as a compliment that you checked out my 110 skins. Thanks!