Ship builders make enormous use of marking pens for marking metals. The Mighty Marker® Permanent Jumbo Paint Marker PM-23 is the favorite pen of our shipbuilder clients along with the Mighty Marker® PM-16 and the more cost effective Flomaster® Permanent capillary-action disposable markers (36 dozen in a case). All of Arro-mark®'s permanent paint markers stand the test of time, are waterproof, weather proof, salt-waterproof, fade and abrasion resistant, resistant to sunlight, and are highly visible.