Caña de hierro EDC para exteriores de 1/2x6 pulgadas/agujero de supervivencia de pedernal de ferrocerio arrancador de incendios
This coating needs to be gone before a spark can be created. A general rule of thumb is that you should see a shiny area on the rod/striker where you will scrape. you can use anything from sand paper, stones, a knife, a file.