RickF, thank you very much for your reference. It proved very valuable and I would like to share my findings with you and any others needing this information for the Flower Class corvette.
First, I am attempting to render the vessel as the USS Saucy on her transfer voyage from the UK to the US via Halifax in May 1942. The only photo of the vessel in this time period shows her with US markings. I speculate that she carried UK weapons and ammunition during this voyage.
The web site mentioned in RickF's post does not show the 4" naval artillery shell that would have been used. But it does have a page detailing the generic markings for a RN Naval artillery shell. The color illustration has the shell rendered in olive drab.
There is another similar page showing a torpedo warhead and depth charges. There are two depth chagegs, one designed to be launched from a ship and the other one is designed to be droped from a ship. The aircraft unit is rendered in black while the naval unit is rendered in a dark grey. The illustration is such that one can't determine the exact shade of grey. But, if one renders them in a dark grey they will probably be in the ballpark. This is in contrast to the depth charges shown in color photos taken on the Canadian restored vessel HMCS Sackville, which are painted a very light blue.
There was also a page on hedgehogs. They are rendered in black just as they are on the HMCS Sackville.
Now that I think of it, I wonder if the vessel had hedgehogs in May 1942. I believe these were a wartime development. When were hedgehogs deployed to vessels? Does anyone have any ideas on this?
Again thank you very much RickF.
Regards, Jay