Thanks. I'm tempted to buy. Ramifications noted. Alcohol, Lysol, and
bleach will all kill the virus, but the issue is not the nature of the
fluid, rather where the fluid doesn't get to. Leftover sawdust and
chips deep in the saw that the spray doesn't reach are well protected,
until they vibrate out into the wound. The wipe, brush & spray sounds
more sensible, but ...

If professional arborists simply spray the exposed blade, all the more
reason to buy my own saw rather than hiring them!