I just purchased a Bengall razor off eBay, pretty much identical to the photo, no etching, no other markings besides "Bengall" (and the "TR Cadman" spiel on the reverse).
It had some discolouration and was purchased for practice, so I decided to sand it back and try to get a mirror finish on it. The steel seems to be extremely hard though, I spent about 20 minutes sanding with 180 grit and I don't think it even scratched it. I then used an 80 grit flap wheel in my Dremel, this did take some steel off, but it took some work.
Now I am using a split mandrel with 180 grit and it still doesn't seem to be marking it. Was there a batch of these that use particularly hard steel? Anyone have any ideas on how I can sand this?
About a week before, I purshased another Bengall etched with "Full Concave", this one sanded nicely and came up close to a mirror finish, so it's obviously not all Bengalls.