It does highlight some potential pitfalls. Chiefly the rapid decay of muons and dealing decay particles. Also you need a source of high energy protons.
Proton lithograhy anyone?
Neutron lithography would be better then. You don't have the charge issue.
Considering everything is already in scifi zone. "By harnessing orgasms of space cats"
Muons are also electrically charged - how would that help anything?
Muons are much heavier while having the same charge.