Just had a new door fitted (have done internal doors, but not brave
enough for the front door.

Fits the frame perfectly. Problem is that it rubs on a bit of the
large (1.5m x 2m) inset doormat when opened. This is because the
front right hand side of the doormat well is higher. I'm loath to
have the joiner plane more off the bottom of the door as it will not
then fit so well along the threshold.

So...can anyone think of a method of giving a haircit to a 30x30
section of a coir doormat? I've started with scissors, but laborious
ain't the word. I have googled this but I may be the first..

Thanks

David