I've wondered about doing the door trims Bentley-style, with a diamond stitch pattern:

I don't want to irreversibly change whats there, so would it be possible to just wrap a layer of leather (and some thin foam to give it cooshiness) over the existing trim? Although now that I say this I'm guessing without gluing it up against the backing it wouldn't work. Might just see what the factory leather parts off an LX are worth.