When the coat is ready to be stripped, all you do is take a few hairs between your finger & thumb and gently tug, or i have seen people gently tease the hair to test if its ready t come out, the dog feels no discomfort as the hair is ready to come out. Remember, other dogs like Boxers, Labs and so on shed hair themselves, other breeds need help. You do however need to do it at the right time when the coat ready to be stripped. If it's not ready, it won't come out plus your dog will most definitely let you know
Furminator: Im not a fan but then again our Boxer coats are very short and close. I find a damp chamoi leather just as efficient plus it gives the coat a lovely sheen