I think both of those examples are bad because they both have situations where they were extremely effective: * Masking in tight places: air planes, elevators,

I think both of those examples are bad because they both have situations where they were extremely effective: * Masking in tight places: air planes, elevators, etc * Airplane parts have been incredibly hard to source for the Russian military, they've been forced to regress to cannibalizing very old parts and reaching out to their neighbors (North Korea, China, Iran) for materials that may have been readily available without sanctions