Answer:
With three eyes and as black as night I frequently knock down ten men with a single strike!
Marking mortal privation when firmly in place. An enduring summation inscribed in my face.
I smell like blue paint pours like green paint and I look like a red truck.
Tear me off and scratch my head what once red is now black.
I shrink smaller every time I take a bath.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?