I do not know what age your Shane is, but I have a 15 week old pup that did not like being groomed. She would snap at the brush, and try to run off. It was near impossible, then I realize I was moving too fast with a ~8 week old pup.
So I started from ground zero. I put my brush away, and began by running my hands all over her body daily, and gently praising her to get her used to being touched all over. I would also reward with treats to associate touching with a positive note. I would hold her paws, her ears, scritch her chest, and her tail too ... talking all the time, kinda like in a story-telling way.
"Oh Janka, what big EARS you have! All the better to hear your commands with, my dear" ... that sorta silliness.
On the 3-4th day, I introduced the brush, starting with the top of her back. I use the 'down' command on her, and reward her with treats while gently brushing her, and voicing encouragement. It also introduces her to the 'stay' command as well.
Now she is being taught to stand in place while I groom her, but I still reinforce good behaviour with a few treats. I also taught her to roll on her side as well, with the same method, so I can clean her belly and her wee-wah area since that part gets dirty from rolling around in dirt and grass, as she tends to get pimples if I don't keep it clean.
The touching of the ears and paws are geared towards other grooming practices, like cleaning her ears and clipping her nails.
At the moment we still use the slicker brush, but her adult coat is coming in. So we might have to graduate to the Furminator soon.
Hope I helped a little with my input. Good luck!
As for baths, I can't quite really say. She only had one so far, and she was screaming the whole time in the tub. O_O She needs one later cos she has doggy drool all over her from romping with her friends.