Good luck with your class! It takes a lot of practice and patience but is very enjoyable. I spent 16 years as a hand engraver and gemstone setter for a jewelry manufacturer. I have never done any elaborate designs that would be used on a knife or firearm but it looks very interesting. My experience was hand engraving monogram initials on gold and silver signet rings and setting gemstones in all types of jewelry. I guess that's why jewelry found it's way into my hobby as well. Hope you find it enjoyable and satisfying!