Ahoy,
1. Can not help you with the chinese colors. Maybe someone else fills in or you may start a new thread.
2. Regarding the Wilhelm Bauer you may want to gain a personal impression by looking at these pictures:
Click: Wikimedia Bridge Wilhelm Bauer 1963 Click: Wikimedia Total Wilhelm Bauer 1963Other than that, the Bundesmarine (=German Navy) generally used colors according to RAL specification.
For this you may find the following information interesting:
Light coloring:Bridge, Hull, all horizintal superstructure: RAL 7035
Decks: RAL 7012
Demarcation Line arround CWL: RAL 9005
Under water hull/ship: RAL 3009
Dark coloring:Bridge, Hull, all horizintal superstructure: RAL 7000
Decks: RAL 7012
Demarcation Line arround CWL: RAL 9005
Under water hull/ship: RAL 3000
As for the Wilhelm Bauer in that time period it does not seem to be RAL 7000 nor RAL 7035. 
However RAL 7000 equals to     
-   Hobby Color - Gunze Sangyo No. H337
 
-  Humbrol No. 145
 
-  Revell No. 57
 
-  Testors / Model Master No. 1721
 
RAL 7035 equals to 
-   Hobby Color - Gunze Sangyo No. H338
 
-  Humbrol No. 196
 
-  Revell No. 371
 
I am discussing this on a german board and may come up with something more detailed. Donīt hold your breath though.
Personally I feel like the Wilhelm Bauer has been painted RAL 7012 which equals to
-   Humbrol No. 78
 
-  Revell No. 77 / 378
 
Please take the reference to other manufacturers paints as an approximation.
Hope this helps some.