How to permanently get rid of vellus hair?

I am half Irish and half Greek. My body hair is mostly black and course however I do have blonde vellus hair on parts of my belly, upper arms and along my hairline. I know lasers cant detect blonde vellus hair but would electrolysis? I want all of my hair gone. I'm so sick of it! I also wanna laser my hairline but I'm scared they might take to much off. I know this sounds crazy but are there measurements that can be taken or a machine that will determine my perfect hairline? Thank you so much!!