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How to remove primer
Pour vegetable oil into a dish.
Measure out enough vegetable oil to cover the primer stain on your skin and pour it into a small dish.
Most primers are oil-based, so plain water won't be effective against them.
As oil-based products, though, they are oil-soluble and can usually be lifted with the use of additional oil. A little will go a long way, so you may only need 1 to 3 tbsp (15 to 45 ml), even when you need to remove a large primer spot.