Re the blood from Tank's duty as an ambulance, I asked a mate who used to supervise cleaners etc in hospitals, and his advice was to wet down with cold water, then some wool wash, blot, and repeat.

The detailer who worked on Silver when we first bought it, and Casper the Camry, got things really wet, and made extensive use of a wet vac.

I have a biggish wet/dry vac if you want to borrow it.