Get a pencil with a rubber on the end, a hole punch & some 2000 grit Wet & dry.
Hole punch the paper & superglue it (the circle!) on the rubber.
You've now the ideal tool for feathering the edges of the chip, and for flatting off the blob of paint once it's dried down, without flatting the rest of the spoiler.
With a bit of patience, the chip should be hard to detect. Well, only you'll see it!
Nick
“I find myself irresistibly attracted to cars that nobody else buys. The NSX is a classic of the genre because nobody buys it and yet it’s a fantastic car. It’s got a wonderful compactness and simplicity and unpretentiousness to it. Honda rudely continues to make them whether we like it or not, even though there can be no commercial logic in doing so — I thoroughly admire that.” Rowan Atkinson