Blue line marking paint or spot markers are great for individuals undertaking DIY projects, as well as for creating sports pitches and courts. Blue marker paint is also widely used in surveying, construction, road works and for marking utilities, ensuring that there are clear indicators for others. Suitable for use on gravel, concrete and more, this spray paint is especially versatile and easy to use. You can create bright, highly visible lines on several surfaces and from a variety of angles due to the cannister's intelligent design, and the paint will last for a few months before eventually fading. The semi-permanent nature of this marker paint makes it especially suited to areas where lines are amended frequently, such as on playing fields and at events.