Time for a bit of colour..red mostly!
I purchased a set of Soviet stars from BECC, not the usual addition to a sub, but it looked good to me. Also some hatch details picked out in red and white, including escape trunking, consisting of the remolded part of a KV1 tank, painted red, with a BECC bowthruster warning symbol on top of the red and a little tinky widdle red star right in the middle...note to self...'get a life'.
Metric depth markings finished off the decoration, they were not completely blended in to the matt finish of the rest of the paint job, despite using a pretty good matt varnish, the original glossy finish still shows through just a bit.