Hi son, When you prune branches from the wall, marks from their attachment (roots or tendrils) will remain and may be unsightly until new growth covers the area. If you ever remove the vine completely, these marks will remain for years unless you paint over them.
Vines that attach to the wall should not be used on stucco-covered walls. They can pull the stucco off, and tendril and root marks will remain on the stucco if the vines are removed or fall off. cheers skylight