Our Mighty Marker High Temperature markers are very specialized industrial products. Contrary to first glance, they are not meant mark surfaces while hot. Under no circumstance should you try this because it is dangerous, will damage your marking pen, and you will not get the mark you desire.
Marking should always be done on cool or room temperature metals, ceramics, or glass. The pens that we make make a mark that drys in 5 seconds or less, and once dry, will be taken up to 1000 degrees centigrade. Once the melting-point of the pigment is reached, it is then permanently fused to the metal. Because of this, it is arguable that the resulting mark is the most permanent and durable mark you can possibly get from our products. Once the pigments are fuzed to the metal they are indestructible and nothing can be done to get them off.