saw something that interested me awhile ago.I found a thread that you can engrave your own stuff with a DC converter,something that pretty much everyone has laying around from a phone,appliance of some sort,Q-tip.a couple alligator clips,electrical tape and some salt water..I put the electrical tape on a receiver stub,cut a design in it with an exacto knife and then I hooked the alligator clips to the two leads from the converter,hooked one to the metal and one to the Q-tip,soaked the Q-tip in the salt water,plugged in the converter and started moving the wet Q-tip over the design.the parts were cut deep with the Q-tip action..I just did a quick outline to test it and here is what I came up with.you can make some nice designs if ya took your time,I didn't,yet.but I figured I have plenty of things to engrave.I colored the design with a sharpie to show it better.