FabricMate markers are some of the most popular markers out there for textile purposes, and now are available in an opaque, metallic line. These markers use a thick, water based, dye/metallic pigment combination which soaks into the fabric and dyes the fibers, unlike traditional paint markers which 'paint' on top of the fabric. They work on both light and dark fabrics, and even write on jeans. A handy tip from a customer is that if they are hard to get "started", cap tightly and set upside down in a mug of hot water for a minute or so - works like a charm! Have a paper towel handy when you then take off the cap, just in case.