I use scotch blue painters tape https://www.amazon.com/ScotchBlue-Pre-taped-Painters-Plastic-24-Inches/dp/B00D8OFE9C/ref=sr_1_4?ie=UTF8&qid=1548446127&sr=8-4&keywords=scotch+blue+painters+tape
You don’t need the scraper anymore, I read this clue and it’s a great thing to print.
It works perfect with PLA with ABS I don’t know yet.
quick question on this. Does the heatbed need to be turned off? Or it doesn’t matter?