Kitchen drain cleanout is accessible via back wall of house.
Jackass who painted the house (and probably the jackasses
before that!) just slopped paint all over it.

ABS.

I can clean it and open it to verify it will be ready when/if
needed -- perhaps even replacing the plug with a nice, brand new
BLACK one -- *or* hope it's NEVER needed and defer that
"acid test" until a time when it actually *is* needed.

I.e., risk breaking it *now* (and having to replace the works)
or just make it look pretty and worry about breaking it
LATER (or possibly never)?