John, i got started on this method about 10 years ago. I just wish id known about this method 10 years earlier, I have tried steamers, solvents, gels and god knows what over the years but this is by far the easiest/fastest on the type of carpets found in clubs n pubs. To be honest id sooner walk away from any gum removal job. Unless its insisted on by the customer of course then we do it. Charge wise £45 per hour per man.
Richie.