metal clad front door

Our front door looks as if it has had several coats of paint applied before the previous coats had dried.
The door is (I think) wood with some sort of metal sheet cladding (didn't half make a mess of my chisel when I went to change the locks when we moved in)
What would be the best way of preparing it for repainting (sanding / nitromors/heat gun ?)
and would you recommend any techniques for replacing it ?
ta
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I have just stripped a front door. I started out just wanting to plane a bit off the bottom to stop it sticking, but then I saw how lousy the paint was, and decided to strip it. A heat gun had little effect, as the paint would not bubble very much no matter how long I held the gun on. I then bought 500ml of Nitromors, which worked ok, but since my door is mainly glass and very little wood I was surprised to see all of it used up. Unfortunately that still left paint on the door, particularly the tenacious undercoat. The killer was that I wished to strip the door back to plain wood and then apply an exterior woodstain, so had to remove ALL the white undercoat remnants. This was easy enough on the flat door surfaces, using an orbital and detail sander, but the beaded full-length mullions needed doing by hand, which took a day and ruined my fingertips. Then I found my weatherboard was rotten so I had to replace that and treat the door for woodworm. Then someone pointed out that the rimlock on the door was rubbish and should be replaced with a five- lever deadlock. Then my brother pointed out that the door furniture was cheap crap and I should replace it with brass stuff. Finally, someone else pointed out that the door glass was a bit naff, a bit seventies ( like the door ), so I should get it reglazed....... Belatedly I realised that my door was a dog and I should have bought a decent hardwood new one and have done with it, but I've put so much work in now I can't bring myself to replace it. Dunno if that answers your questions, but I certainly feel better for getting it off my chest!!
Andy.

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Andy - that's why I asked the question, particularly with this being a metal clad door - I don't want to take the wrong approach, put a lot of graft in and then find I'd have been better off putting a new door in
ta
mike
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