I have a client who wants to use moisture wicking shirts. This is my first experience with 100 polyester so I am wary of dye migration. The client wants something with a relatively soft hand, so I plan on testing Premium Plus and Superfilm. My plan is to press both onto the color/brand of shirt I would be using, let it sit for a couple of days, and then wash and dry it 5 or 6 times. Would that be a vigorous enough test, or are there other factors I need to test for?