There has already been great advice given, but I thought I would add how I got Henri used to brushing.
I started with a natural bristle brush and started brushing for only a couple of minutes a day, he would bite at it and all but I was persistent. I would talk sweet to him during the process and then give him a treat when done, I would let him sit in my lap during brushing. Henri eventually got used to that brush so I moved on to the metal comb and then the pin brush. Don't introduce multiple grooming tools at once, get him used to them one at a time. Now I can brush Henri anytime and anywhere (he no longer needs to be in my lap, he will just sit there nicely while I brush him), he loves it! He gets excited when I bring the brushes out.
I hope this helps and good luck!
