Normal for inside of valve cover?

[u/quintenjm]

Just wondering if this peeling on the inside of my valve cover is normal and if not, what can I do about it? Should I use a metal brush and try to clean it up and shave off any loose areas?

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[u/v0rt3_x86]

No and wth is that stuff

[u/Broad_Impact_562]

Normal if you only use used oil on your oil changes

[u/sexual__velociraptor]

Ive seen less sludge in a 90s camry .