I'm not an expert on Russian ships but one of the things I have noted is that many ships have a coating painted over the red-brown colour which can make the deck look grey. This seems to be different on ships of the same class so you need to decide which you want your kit to represent. Another thing to note is that the Russians seem to extend the red-brown colour up about 100 to 150 millimetres (4 to 6 inches) up the vertical surfaces.
Here are a couple of links that might help.
Udaloy class...
http://www.fas.org/man/dod-101/sys/ship/row/rus/1155_1.htm
and Russian ships in general...
http://www.navsource.narod.ru/02.html
I believe ships 212 to 225 are the Udaloy class.