Two comments:
1) WEM's product is enamel
2) Soviet deck red/brown is not an exact color. In 1989, two Soviet warships visited San Diego, a Sovremmenny (Sov) and a Udaloy. They were in distinctly different shades of paint. The Sov was much darker grey and had browner decks. The Udaloy was a lighter grey, with a buff tint to it. Udaloy's decks were redder. And this was not a feature of a fresher coat of paint on one than the other - they had both been painted VERY recently. Maybe the colors reflected their different ship classes, different parent squadrons or different fleet ownership (both in the Pacific?), but the fact remains that two ships tied up in San Diego didn't match.
My point is that an "exact color recipe" may be correct for one Russian ship, but much more work than you need to go to for a different ship.
Take a look at:
http://www.hazegray.org/features/russia/
and particularly at
http://www.hazegray.org/features/russia/bpk18.jpg
http://www.hazegray.org/features/russia/bpk22.jpg
http://www.hazegray.org/features/russia/rkr07.jpg
and see the different shades of red/brown.