Welding doors should take a second, and an action bar.

[Ion Mage]

+1 to at least making it more visible and possibly audible somehow. Its kinda weird that if theres even a slight visual distraction, a task that would produce bright flickering sparks realistically can go by completely undetected until after you try using the door.

A mild delay would also make sense, though it doesnt need to be too long. Just think its wierd that people can do drive-by weldings so easily.