Tagette (tagetes minuta)
Tagette oil is, unfortunately, photosensitizing and can cause dermal allergic reactions in some people. But since it is such a strongly scented oil, a dilution in, say, a soap blend would probably be the safest way to use it dermally. It has also been used as an insect repellent, and the leaves are used for culinary purposes.
*The photos do not depict Tagette, they're just pretty sunny flowers in the garden. And an aphid.