G-J
p.s.: After browsing through the ship forum posts, I may have the itch to try one.
Careful, 'tis a dark path!
As has been mentioned, there isn't a "weathered Deck Blue" in USN colors. There were a couple of different flight deck stains during the war, as the Navy bounced around different camouflage theories. For a 1943-ish F6F-3, you want to look at " #21 Flight Deck Stain." This was revised in mid-1944 and kept the same designation, mostly, to " #21 Flight Deck Stain (revised)." The early color was designed to match the Navy's 5-O Ocean Gray when fresh, which was somewhat similar to the non-specular blue-gray used on the two-color aircraft camouflage. The revised was similar to the Deck Blue (designed to match, but paint and stain on wood will always look different next to each other). Both were weathered to **** and gone quickly, due to gas, oil, rubber tires and shoe soles, etc.
I like the WEM paints as well, but Testors now has deck blue in their line, just not widely stocked. If you don't want to get the actual stain for your time period (and are doing a later time period) that would probably make a good base color before weathering.