I don't have a dirty job anymore, but the dirtiest job I've had by far was industrial carpenter. I'd go to work with clean jeans and a clean white shirt, and every day I'd come home with jeans that were black from the knees up, and a shirt that was black from the chest down.
I had to wear white shirts because nothing else would come clean. Only white with a lot of bleach would give any appearance of being laundered after a day at work on that job.
I still have a T-shirt from that job, some-odd 20 years later, and it has Hilti C100 industrial epoxy stains all over it, just as hard as the day the shirt was stained. That's my "shit's about to get real" work around the house shirt.
Working up in the rafters for concrete tilt-up buildings that had already been in service for decades. There's so much nasty-ass grime up there, and years worth of dust and crud.