We don’t recommend painting helmets with the X multi marker as it can potentially compromise their safety. Helmets are designed to meet specific safety standards, and adding paint can affect their structural integrity and protective features.  Due to the vast variety of materials available, we can’t guarantee that the chemicals in the paint will not affect the helmet material, reducing its ability to absorb impact. It’s best to consult the helmet manufacturer before making any modifications, as this can also void warranties or certifications. If you want to customise your helmet, consider using manufacturer-approved methods or accessories.