A machete is a thing of wonder, but you've still got to pick up the darned branches afterwards, and the thorns are no less prickly for being detached from the shrubs!! You can buy genuinly thornproof, virtually chainmail, workgloves from an industrial type store or on line, but they are incredibly expensive. I find a good pair of leather gloves, really sharp secatures and a grippy thing to pick the branches up with to put them in the bin or in a load for the skip the best. The grippy thing ia a cheap (£5) item for people who can't bend well to pick up newspapers and smaller things that fall to the floor - it does work. I don't compost roses as the thorns just do not disappear in my experience.