Uni Paint is best described as an oil-based version of the Uni Posca markers. The markers contain a glossy oil-based enamel paint and come in several different sizes and colours. The most popular is the silver-coloured PX-30 and the PX-20. If you ever see a silver tag made with a marker, it will most likely have been made with one of these markers. The paint of the markers sticks to most surfaces and they are also frequently used in the industrial sector.