Get him used to being picked up and handled. I give a grape or two and say "good boy", to reinforce cooperative behavior. Use this time to build trust with him, so he knows you will not hurt him or the hens. Lots of alone time with you and some goodies.
Then, buy a Dremmel tool, and learn how to use well. Or, there are other methods online. They can even be popped off, but will re-harden and continue to grow in 2-4 weeks.
Part of having a rooster is managing their physical needs. Trimming and buffing the spurs 2-3 times a year, checking the feet for bumblefoot or injury, checking the scales on the legs for scaly leg mite, and administering meds and vitamins. If you want them to breed well you will even have to give them a booty bath! LOL!!!
If you keep the rooster healthy and happy, your hens will benefit too. He'll be relaxed and won't injure the hens with his spurs. These are all things I do for my "Frito". He is three and half years old now, and so important to the flock. He helps me by keeping the peace within the flock, as there are a couple of trouble makers. He alerts to any predators and teaches the newbies chicken etiquette. Ha-ha-ha, I think he's earned a raise!