how do you remove exterior vinyl decals without ruining the finish?

Just peel 'em off.

temp. helps. try peeling them off when your xB has been out in the sun/heat for awhile.(depending on where u at.) if not use a hair dryer or heat gun & keep distance apart from gun & object, so u don't damage your goods. (depending where your vynals are at. plastic, glass, metal, etc.) and start peeling section at a time, as you heat up the vynal & object. (not to hot!)
also depending on how long u have had the vynal on, you may need to use some adhesive remover, to remove the sticky adhesive. ( read the instructions & use it at your own risk ) you can find it at your local pep's, auto z, kragn, etc. they come in spray cans.
just as u know, stay away from sharp objects! & be patient.
hope dis helps

well i removed the black tape b4 but then i put some cf vinyl in it's place and want to remove em(damn waste of money)

should i remove my vinyl cf or no? check my profile