Success / Fails With Carpet Dye??

Auto Carpet is PLASTIC fiber, and never really soaks up anything, it lays upon the surface; it cannot absorb dye like a natural fiber,
but if you can accept the harshness upon your bare tootsies, it can give you an extension to the next checkpoint, maybe 5-10 years of not appearing shabby.
Rear deck, use any spray paint that brings back the black, softness be damned.