How do you know that those lines on the edges of the plates indicate brass/copper alloy trim? Perhaps it's not so good to make that assumption?
I don't know, but I'm trying to figure out what they are, while looking for armour in a similar style and seeing what they have instead.
On a basis of that, one can make a pretty educated guess.
For example:
The same with the left pauldron on this armour, you can interpret it in many ways. Looking at most italian armour, I interpreted it as a variation on the italian gardbrace theme with fluting, like this:

Certain sculptural effigies, mostly strictly English styles not Italian export, pretty conclusively show applied borders, often with figured decoration and probably originally latten, but I don't think you can say the same for the two dimensional brasses you are working from. It's risky assuming that those lines -conclusively- indicated applied borders. They could just as easily be incised lines, sunken borders, or the selectively gilded borders I mentioned earlier.
That's what I wanted to know. My vision's got a bit blurred, because before speaking with Toby, I thought this was a style of english armour and interpreted it as one. And he didn't comment on the edges, I'll point that out below.
However, I really like to see the pictures of the Hungerford tomb effigy, for several reasons. First of all, my best friend wants his armour based on this effigy and second, the armourer who's just started on the legs told him there's an applied brass edge on the legs.
I'm also interested in the pictures of the other effigies, because it helps me in my study and making sure for me I'm doing the right thing.
What bothers me is that I've shown Toby my first vague designs, also featuring this bordering and he didn't comment on this. He corrected me on most style errors and approved on my second version as well.
Now I'm making detailed designs (with a few corrections, here and there), and I could really use the pictures to base my own opinion on, while taking experienced people's opinion along with it.
I appreciate your comments and concerns, thank you!