Gray Campling’s line marking machine Powrliner can help warehouse operators sidestep the need to call in costly contractors. The company says the machine can help companies save up to £10,000 and can be used for a range of tasks including spraying loading bay lines and lorry park markings, and general unit maintenance. Gray Campling, which has furnished the distribution centres of big name retailers Tesco, Waitrose, Somerfield and DSG Currys, says it can help sharpen up health and safety because areas which need attention can be remedied quickly.