Originally Posted by Saddlebag
She has come to associate grooming with work. By work, just the saddling and bridling and packing you around. She knows the routine. I'll bet if she was in a paddock at liberty she'd allow you to brush her. If she walks away, let her, she'll stop sooner or later, the just approach and brush again. When you're done just walk away and leave her be for a while. Horse ownership isn't always about riding, it's also about building a good relationship without using harsh tactics.
I have tried the very thing you are talking about. And I would say 6/10 times that I groom her don't end in tacking up or riding. I try to do a lot of brushing and just ground handling.