Jordan wrote:
I'd like to cut corrugated roofing steel, and get a nice clean edge like
from the factory.
All I can manage is a nasty jagged edge, either with snips or angle
grinder. The roof is low, and I don't want the hazardous edge.

Q: Can corrugated sheet be neatly cut by shears/guillotine?

I've wondered the same thing. I assume roofers use a special guillotine
with a wavy blades (so as not to flatten the corrugations), but I've
never seen one. I'd be interested to know if you find the answer.

Chris