On the CV16 pictures, yes, each cleat is secured with four bolts and nuts, and if I recall, a one inch or 3/4 inch fender washer on each (I used the largest size that allowed them to not overlap). I doubled the thickness of the entire foredeck because either myself of someone else is up there stomping around, casting or spotting, often, when fishing. So I do not have backing plates under there... but only those fender washers. However, those cleats are not yet installed *sealed* with a bedding compound. When I do that, I will install 1/4 or 5/16 inch backing plate for each cleat. When the boat was upside down and I was finishing up the underside of that deck in the cuddy, this is what it looked like (ignore the red arrow):
You can see two of the bolts, washers, nuts, currently holding one of the cleats in place for this picture. Note that I used nylon insert locking nuts. Again, at the final install and bedding (one day soon!), there will be some backing plates in there also, with a glass laminate on the *washer* side.
Now, on a GV, if you mount a cleat on the bow seat, you could do the same sort of thing, but if you mount on the bow transom, like Cracker Larry did on his, it would be best to ask him, over on his thread, whether he through bolted the one in the picture, or used screws with globs of 5200 or epoxy. He does things with good thoughtful reason, so now matter how he mounted his bow cleat, he will be able to explain why he did it that way.
Regarding the patina, if you mean the bow seat on the GF16 in the river, that is (was?) Cracker Larry's boat. He would be the one to ask on that. He is a regular poster here on many threads, and is currently documenting a build of an fs18. This link is his latest
on that thread.
If you mean the white foredeck on my CV16, let me know and I'll briefly summarize that finish.
When your GV is launched, post us a picture or two of it in Hawaii waters.