All you need is to find the best nibblers for your sheet metal cutting projects.
How to manually cut letering out of sheet metal.
Another tool is a plate shear for cutting slightly.
How to plasma cut calligraphy letters.
Apart from hand nibbler there are electric nibbler drill powered nibbler and pneumatic nibblers and so on.
The way of cutting sheets with nibbler is to cut punches out of a tiny metal sheet and repeat the process until you get your desired dimension.
I made this at techshop detroit this is a simple quick and easy process for making some calligraphy letters out of sheet metal materials and equipment 16 gauge sheet metal plasma cutter welding gloves and welding goggles bench grinder.
I have also read that laser water cutting nozzles can get caught in stamped grooves which could damage the nozzles so that option is out.