Might as well pitch in.
Aside from full hazmat suit and, hopefully, toxin meds, why not add a filter and/or gas masks, along with making dusters and parkas give some degree of protection? I mean, it covers you like some plague doctor.
So it kinda goes like this:
- makeshift mask - cheap and craftable with some researching
- military gas mask - military helmet of filters: heavy, you can't see much from it, breathing suddenly became much harder, but rather sturdy and has good filtering
- filter mask - kevlar helmet of filters: covers the face, light, no vision or breathing penalty and can still help you survive a bullet or two, but the filtering is bit worse
Worn under the helmet or cowboy hat for added badassery. Maybe a modicum of protection too.
Finally, dusters, parkas, power armor and everything that covers you but doesn't directly touch your skin can provide
some protection.
A !!fun!! thing to do would be changing the flow of toxin buildup: as opposed to simply slowing down the whole thing, just let it reach certain point like "initial" or "minor",
then slow down the progression.
This way suits become more valuable as they prevent the toxin buildup altogether.
Last logical step would be either introduction of military suits with less movement penalty and better protection, or changing power armor to give that sweet protection against the everpresent toxic environment.
Lastly, meds are hard enough to come by as it is.
It's only fair to make cheap anti-toxin from the healplant, or whatever it's called.
Regular would then be made from plant(s)+meds.
Naturally, with a purchase-only glitterworld-tier to top it off.