when you create and import your items in engine, it create a UPK file with the name of your Package, you need find where in your pc is saved in my case is in this route (Documents\My Games\KillingFloor2\KFGame\Unpublished\BrewedPC\Maps\SDK)
"Can cosmetics have skeletal meshes or are only static meshes currently allowed. If so how would one implement the skeletal mesh properly into the game for testing?" You would skin this by "skin wrapping" your item to our characters mesh/skeleton, converting it to a skin and then importing the item as a skeletal mesh.…