I am an amateur detailer. My compound and polish with my DA polisher didn't affect the below spot. Instead of getting too aggressive on my Acura MDX, I stopped for more research.
Do you know what causes flaws like these, how to treat them, and how to prevent more like it? I have probably half dozen spots like this on the front bumper.
Was it rock chips, acidic bug guts left untreated by the previous owner, or what?