Monokote on Monokote
You may have a problem trying to get the old bubbly monokote off, what may happen is as you pull up the trim piece the base coat may tear off with it, but if you can get it off, just cut the new trim piece a little larger than where the adhesive is, or clean off the adhesive with a product named Goof off, can get at a home center. When you do attempt to take the trim piece off, heat it up a litlle with a heat gun. Dazzler