I’ve got the heavier one. It’s really good. The lacquer is coming off the inside but that’s ok. The bare Cooper surface has a little more texture and makes lathering even easier. If I use it regularly I doubt it will oxidize significantly.
Not sure what the coating was but I’m not drinking the Lather and it has worn off slowly over the year or so I have had it. The coating on all blades wears off as you shave.