use a punch press or drill it
A plasma cutter.
The best way to make a hole in sheet metal is to use a drill with a metal-cutting bit. This method is precise and efficient for creating clean holes in different sizes. Alternatively, if you need a larger hole, punching or burning with a plasma cutter can also be effective, depending on the thickness of the metal.
you want to make a hole in a muffler or you want to patch one up. Make a hole you can use a drell patch a hole best use sheet metal and rivets then muffler puddy around that
Either use glasses with a heavily tinted lens MADE for solar viewing, or make a pinhole camera. Use a straight pin to make a small hole in a sheet of cardboard. Let light shine though the hole onto a sheet of paper about a foot away. Look at the paper, and you will see an image of the sun. Do NOT try to look through the hole at the sun. Stand with your back to the sun.
Steel.
Take a sheet of plastic sign. Then cut a hole in it. Put more then one sheet.
41,600
forged steel or sheet metal with plywood
they are being cold rolled to make bars
Sheet aluminium, or tin coated rolled steel.
I mean you COULD.. but then you'd run the risk of having aluminum in your food
Yes, the safest way is to drill a small pilot hole first. Do not make your new hole in the same section as the old one, turn the shaft around, or flip it over.