[header] How to remove primer [title] Pour vegetable oil into a dish. [step] Measure out enough vegetable oil to cover the primer stain on your skin and pour it into a small dish. [substeps] 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.