Replacing/Fixing Exterior "Trim" Around Door and Windows
If it was done with the siding, you're in for a fiasco. You might just trim it off to the siding's J-channel. But, it should be nailed-on along both edges. Unless you've got a Sheet Metal Brake or know how to duplicate its clean bends without a Brake, then I'd just leave it &amp; tack it down behind the hinges. It's likely that it's covering rotted wood &amp; what you don't know won't turn into a huge ordeal. Unless, you're up for doing it completely right.