Hello Darius,
to 1)
There are / were 5 things telling this:
a) A Russian colleague with same intrest in Russian Navy told me during a discussion about cruiser Varyag (1904) depending to question about hull color when Varyag was re-painted from Wihite to grey in Port Arthur (question was: During overhauling in drydock of Port Arthur, was hull repainted from green to hull red?). His saying was that white peace time paint was mostly in Baltic with green hull.
b) A Russian book of colleague above telling this (he showed during discussion) - title I give you when I get answer from him
c) in a Russian forum it was told by someone - link I will search and give soon when found again. A little bit difficult to reply search because Russian language
d) 2 colleagues who are / were at German Navy Intelligence confirmed that Russian vessels of Baltic Fleet during cold war often changed their colors often, including a green hull color ...
e) another colleague who served in East German Navy on a Tarantul class ship told same as colleagues of d) + that this was often seen on Russian mine sweepers (/ layers
Sure, d) and e) are depending to modern Russian / Soviet Navy, but colleagues told that this was given since Tsar time of Russian Navy in Baltic Sea.
to 2)
Depending on you big knowledge you showed, I trust you full, so please no miss-understandings Darius and I'm very thankfull that you confirmed what I thought too.
I wanted only to show you how a guy as I with still less experience at ships can become confused when starting investigations about things. You know saying: If you ask 3 "experts", you get 5 different answers...