take a look at the Vascular Birthmark Foundation website:
http://www.****.***
If laser therapy has not been, used, then this would be the first form of treatment that should be attempted to try to "erase" your port wine stain. If laser therapy has ben used with limited success, then surgical excision with graft may be possible. The grafted skin will not look exactly like your normal facial skin, but can eliminate the port wine color. Consult with a local plastic surgeon about this.