Wow. That sucks you're having the issues man. Very sorry to hear. But, a learning experience for all of us really, and it's doing all of us a favor too. This is why I like to share my experience's with things so people can learn something from me hopefully. So, Thank You

. Now you've got me thinking about this subject more in depth, mainly because it has been a LOOONG time (years) since I've had my solvent, so it got me thinking about the powder coat itself and how it's held up for me over the years since I built my parts washer. The solvent, if it's lost cleaning strength due to age.
The parts washer I built and had powder coated has held up extreeeemly well. Granted my parts washer probably, (< I added "probably" to make ME feel better

) gets used for a work bench a thousand times more then for parts cleaning, but it has gotten used and abused. I've not been protective of it being freshly powder coated and worrying scratching it up or the solvent degrading it in some way or even completely desolving it away to bare metal, not that I thought it would do that, but still.
Reason why I actually even say that is the store bought parts washer I sold to another member was a painted sink type unit, and the paint in the flat area at the bottom of the sink had desolved and scratching away from use to bare metal. I'm talking BARE. It would not rust while in the garage, closed, for months of non use, infact I don't think it ever rusted while kept inside. But left outside it would over time, a long time. But it would eventually start to rust of course.
I would just run the solvent for a few minutes and skotch brite skuff it a little and it would be good not to rust up for a hella long time. So, as I mentioned, if it desolved away to bare metal, it's totally fine with me. And I'd bet Jess is still using that washer to this day.
But I figured powder coat would hold up well but really didn't know how well it was going to hold up to this particular solvent since I'd never used it before. On a scale from 1 to 10, I give PC a 10. You can't expect any plastic coating to hold up to harsh solvent and not have some degradation. But I'd say powder coat, for a affordable coating is as good as your going to get period. Does it hold up to long soaking time? YES. I've left solvent sitting it the bottom for months. Wipe it away and it's no different then any other part of the unit.
Infact I think it keeps PC from getting "dry", or chalky like PC can thats been out in the sun for a long time. Thats usually when it's a thin poor quality job. I spicifically requested a thick coating, which I got, and am very satisfied with. The guy said he would make sure the blasting was a very good job for this thing since it's going to have solvent in it so the PC would be the best bond possible. I use a quality powder coater and they did a great job.
I purchased all the hardware and all the stuff to build my parts washer from McMaster Carr, less tubing for the frame. Pump starts like a swiss clock even after many months of non use. I've had zero leaks and have moved this big behemoth multiple times. Only issue is the tank lid wasn't a sealable type lid so it's sloshing when being moved has spilled solvent and I've had a minor mess to clean up. I need a new tank that the lid seals and bolts tight and has a one way vent or something. I should build myown stainless tank to better fitting dimensions for space savings. Great! another freakin project I want/need to do

. They're NEVER ending... lol!
The plastic lid now has been warped for years, so the sloshing will spill a little worse, but I have no need to move it for a long time so until I can afford to replace it or fab a custom, this tank will keep working. Solvent still seems to clean the worst caked on years of grime and leaky oil and grease with ease, no difference I can tell honestly. If it's burnt on type crud it takes some soaking. I usually let things soak anyways. Just makes things (MY life lol!) easier.
The odor of this solvent has never been bad to me. It's solvent, but still, not bad. My washer cost a fortune to build and for a home use type thing it is WAAAAY too expensive. But I built exactly what I wanted so the cost was not an issue. Now it's working as a great work bench while still being able to be used anytime needed. Only temporary items are set on it. If I had it to do all over again, the only thing I would do odfferent, would be maybe start with a square fuel tank so the bottom of the tank would be flat instead of round, but mine has a lot of structure since it is a round tank I cut in half to use. I would go deeper too. An axle fits but I can't close the lids cause it hits the center section of the axle. I can close one lid if I slide an axle to one end.
I would use the same solvent too, it's not left me feeling unsatisfied that it took too long to clean or whatever. Sometimes it just takes elbow grease and hard wark to get something grimey and greasey clean. No issue, never been afraid of hard work.

. Also, I have fairly sensitive skin to all kinds of things. I do ware gloves but have this solvent on my hands without too much issue. It is super drying on the skin though and will start to sting and tingle after a short time of having it on my skin, and will rash my softer underarm skin easily. I just ware long gloved when cleaning.