I still have lots of missing skins. For example, I have only 3 B-17G custom skins available, the rest are red text. I have only 1 custom P-38L skin available, the rest are red. About 1/2 of the P-38J skins are in red text. This is online, not offline.
My skins.res file is date stamped 8/28/2020 10:37am
I've logged and restarted the game, and also rebooted my PC and restarted game.
Also every time I login it seems to resume downloading P-51D_38.res, even though I think I been online long enough to get whole file.