steve5
not sure how far to go with the weathering , any suggestions ?
Your model, so, sky's the limit.
Turn around, home port to home port was like 6-9 months, depending upon the destination port, and whatever layover there was there.
IIRC, Murmansk and Archangel could be longer layovers, due to ice, so there probably would not have been a lot refti/repaint. British ports were ghet in and get out again, so as to not get bombed in port. Paint and gear for refit was more available, though.
So the hulls probably looked a lot beat up. With damage to paint from ice on the hull (and sea ice around Russia).
Important items would be kept up--weapons, commo gear, boats & liferafts, etc.--during the pace of readiness drills and actual Action Stations manning (which cuts into time available to keep up paintwork).
If the ship got up into conditions were there was icing, there will be significant wear, where the ice was pounded off with hammer and mallets, or melted with steam wands.
By all reports the Flowers were "wet" ships, so you could use salt spray weatehring to the 01 level nearly over the whole ship, and probably the entire bridge front.
You would be entierly accurate to have rectangular swaths around 4'x8' in perfectly fresh paint, over the weathering, to show where the crew repainted.
Your canvas, you get to pick how hapy the trees are.