You can just brush it off ,
when you use powder you need much more powder as it absorbing the IPA and take longer to dry and not recommended for fine details , Zinc Oxide don’t absorbing and are small enough to be used with fine objects, and you need less . I use it now with IPA 99%, it dry in seconds . I used it on acrylic painted objects without any damage .
However for things that can’t be washed for any reason , I still prefer Attblime R2 can or 0.7mm nozzle airbrush, no damages to metals or surfaces and designers favorite . Not to mention half price …
no AESUB for me ever again after what Orange did to my coins and silver-plated objects by dissolving the silver plating .