Currently checking out a motor to but pulled the pan and this is wat the bearings look like never seen something like this

 

Maybe from detonation?

 

Can you feel it or is it just visual?

If it's just visual, I'd say it's from a chemical reaction of some sort that etched the surface (maybe acid, degreaser, or some solvent)
Or a defective coating. Are they "coated" with any type of anti friction/ high performance treatment?

 

I was able to feel it. Not crazy but is wasn't entirely smooth. Crank was smooth and shiny. Did a compression test 220-220-150-230 had to pass but wondering if i should go back any get it. Seller claims it was running

 

I'm no expert. But, that bearing look like it has a bad coating job. Whatever it is, I wouldn't use it.

 

looks like oil cavatation to me

 

Thank you, I think you might be right. Glad i didn't buy the engine .