Cutting Metal Door
What method have you used in the past? I’m down to a circular saw with metal rated blade or an angle grinder with a Zip disk. Either method I was planning on going through one skin first and flip the door and repeat.
I’ve always had issues with keeping a perfect straight line with a circular saw so I would need to rig up some sort of guide. Angle grinder I think would give more control and would let you do small plunge cuts to stay on your line if you really needed to.