Nice set, nowadays you can get anything on eBay so it would be good to have some references about all those different chemical solutions being available.
Some years ago I got a set from Germany and the pen like tool took ages to plate a decent layer, as you mentioned this is thin so I wonder how long it would last when worn on a wrist. Good for cosmetics though or those movement components that are not subject to skin chemistry.
The plating set also had proper bathing tools and containers and so the challenge was with setting the voltage and amperage just about right and had to be changed for every different item depending on material, thickness and size.