Is it permissible to use setting spray on Shabbos? [Setting spray is a liquid mist, with water and alcohol typically as its main ingredients, that can be used to increase the lifespan of your makeup look, preventing fading and smudging.]
It depends on what kind of makeup it is being used on. If the makeup is regular makeup that was put on before Shabbos, and the spray is only helping it stay on longer, then it is fine. However, if the person is using what is called “Shabbos makeup” which is a powder that won’t stick to the skin, (if it indeed has a reliable hechsher, and one relies on the poskim that allow it) then it is problematic and should not be used. the reason is because the spray is now causing the “Shabbos makeup” to stick to the skin, which will remove the whole basis for the heter to use it.