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I'm putting on some metal siding which comes in 3' wide sheets. (Ribbed
Pole Barn steel). There is a garden hose faucet there. My thought is to
shut off the water, unscrew the faucet, leaving just the pipe. But
lining up that pipe, while insuring the steel is properly lined up,
could be real tricky. Fortunately there is a coupler in the pipe only
about 16" inside, so I could remove that piece of pipe too. Then install
the siding, and cut the hole from the inside. (the pipe is 3/4" steel,
but is connected to plastic pipe, so I can move it slightly). My
question is how to cut that hole. Should I just use a hole saw, which
will pretty much ruin the saw, or is there another method or tool?


If you know an electrician that has a hole punch , use it. That is a device
where you bore a small hole and put a bolt through it. On one side is a cup
and the other side of the metel is placed a cutter and you just take a
wrench and screw the bolt to cut the hole.