Sometimes you can use an electric grinder to expose metal for etching, but be careful not to raise the temperature too much so the meteorite recrystalizes. Sawing iron meteorites is much more difficult than one might think. The crystalline metal is very tough and some meteorites contain minerals that are harder than normal metal working tools. If you try to cut a Canyon Diablo Meteorite with an ordinary hacksaw blade you will find that the blade quickly dulls because of the presence of the mineral schreibersite, which is very hard. You will have better luck with a blade embedded with silicon carbide.
Iron meteorites are very hard on diamond blades of conventional lapidary saws.
Some cutters use carbide blades. The best bet for cutting is probably to leave it to the professionals. It usually takes one to five minutes to properly etch a surface. Etching is a art that requires much experimenting and experience. Rocks From Space has an appendix that gives detailed instructions.