Independence Nectarine Fruit Damaged

Q. I have a Independence Nectarine tree which I have been nurturing for two years now. This is the first year I have had fruit!  Of the nectarines I kept I am seeing something on them that looks like dried droplets of sap. It is not sticky to the touch but I have 2 nectarines that do not have it.  Are you able to determine if I have some sort of blight with the fruit? Will I just need to take this plant out?