H2O2 is a powerful oxidizer that breaks down into water and oxygen. When the PM or other organic material comes into contact with it, an electron is moved following LEO sez GER (Lose Electrons - OXIDIZE, Gain Electrons - REDUCE). The organic material is subject to immediate deterioration. The skin of the bud is a complex structure that is not defeated by a dilute H2O2 application, even with all the holes in it caused by the 'tendrils' of the PM trying to get nutes out of the upper layer of the leaf.
When this happens ozzy is right, the tendrils, roots, haustoria, whatever you wanna call em, can remain behind in the plant. If the plant is alive it will be absorbed, if the plant is dead it will be akin to dust on your shelf being skin flecks - but after a case of shingles or something. Washing your shelf with H2O2 would probably render it be sanitary in most environments.
Unless the person smoking the medication is sick enough that spores in less concentration than mass pollination times of community species will aggravate their respiratory systems or general health, then the amount of contamination that remains is subjectively negligible. *exhales* It's like the skin flecks left over after washing the shelf, treating the room, drying it in properly cleaned air (if known contamination exists)...
If the latter precautions aren't taken then why even do the wash?
That being said, treating your plants when you first notice infestation alternating with products like sns, prokoat?, snake skin and treatments of H2O2 you might be able to kill it all and not just have it lay dormant. Cleaning your room of spores helps too. Essential oils, peroxide, and silica continue to be very powerful 'natural' *cough cough* remedies and precautions for many different applications.
The coating products work amazingly for precaution.
