Two stills from a video made by YQBspotting of J-4085/N338AX at Lortie Aviation's facility at Quebec City Airport (YQB)
during engine testing on 18th May 2015, and during the process of losing her Swiss Air Force colours...

The strips on the dorsal and vertical fins look very much like the luminescent strips fitted to other F58s (J-4068, J-4082 etc).
4085 did not have these strips in Swiss service, so clarification would be welcomed.

©YQBspotting Link to YouTube video HERE