Bob, if you are not saving the door skin you can sand through the folded edge of the door skin.
It is the quickest way,and you use the skin for a pattern remembering to ad on the folded edge
that you have cut off when measuring.
We use a high speed sander with a 24 grit disc.
If however you want to use the skin again you can make a tool using an old screwdriver,by heating cherry red bend the blade back over on its self,then heat the stem and put a step in it
so the handle is clear of the bench if held horizontally ,you may have to hammer the bent blade end in under the folded edge of the skin and then work up the edge 90deg working all the way round the skin,and then remove.
does make a bit of a mess though and you have to hammer and dolly the skin back into shape.
Snapon have a hammer for doing door skins,it has a slight kink in the shank,on folding back over you will need to bondi/lead the edges of the face of the skin.i hope this helps.
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kenney
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