Z32 antenna help posted by ZUL8TR on September 10, 2015 at 02:03 PM
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a plastic scraper edge (or flat screwdriver blade with tape) to push the nut screwdriver slot in counter clock wise direction. As needed, tap the scraper or blade lightly with a rubber mallet or similar. Just enough to get it to start turning.
Done it a few times this way on various cars over the years.