i second that , brass rod can be found at home depot,lowes, hobby lobby, hardware stores and most hobby shops and as for the stamp thats a little more advances since the metal has to be glowing red to stamp. but the process i go with for marking my knives is called SALT WATER ETCHING. there is a tutorial at the top of the forum that shows you exactly what to do. i used a 2 amp car battery charger and it worked great but to a while to get any depth. im sure with a higher amprage charger for car batties or even an old cell phone charger would work great. remember to take pics to show us your progress and easyier for the more experiances guys to help.