We have a very ordinary garage with a very ordinary metal garage door.

The paint is in a bad way - and I have been ignoring it for years. But
as the door is perfectly functional, I would rather re-paint than replace.

What is best approach? Worth stripping off the old paint? If so, how? Or
only where it is doing so already?

Something I have never done and don't want to end up making far more
work than needed. At the same time, I want it to look OK and last
reasonably.

Given recent weather, I don't think I will be starting for a while, but
that leaves plenty of time to mull over any responses.

--
Rod