INKZALL liquid paint markers from Milwaukee Electric Tool Corp. are designed for darker job site surfaces, such as black pipe and structural steel. The pens feature wear-resistant acrylic tips for writing on dusty, wet or oily surfaces up to 300 degrees F. Marks are both water- and UV-resistant with a 10-second drying time. A textured barrel makes the pens easier to use while wearing gloves. Colors include white, yellow, black, red, green, blue and orange. Fine-point markers are available. 800/729-3878; www.milwaukeetool.com.