is this a concerning amount of cylinder wall wear?

[kolosy]

I'm supercharging a 150k mile motor (which is questionable in general, i know), so I pulled the plugs, scoped it and ran a compression test. compression is bang on at ~185psi / 13bar across all 8. it's on WPC treated bearings from about 40k miles ago, and has had good blackstone reports. The bores do look like this (+/-). Is this scoring, or just wear and how concerned should I be?

[spammysammich]

Scoring looks like deep scratches in the vertical plane and will absolutely result in loss of compression on these engines. I think jvictormp has good pictures of bore scoring. Or just look up bore scoring on Porsche aluSil engines. They’re subject to the same injector related bore scroring as we are. Also there are a lot of S85 examples if you google it.

[spammysammich]

Scoring can also look like a patch of cylinder wall highly polished or discolored compared to the surrounding material. It feels different to the fingernail than regular honed and etched aluSil.

[kolosy]

i don't have the heads off so can't do the fingernail test, but it doesn't look like what comes up when i google bore score. good compression squares with that. just trying to understand if what i'm seeing is just harmless "patina," or some sort of damage that i should be worried about.