I did it a bit in the very last stage of my marriage
Married a very long time, he had always had more power in the relationship - doing what he wanted, making decisions without me, all house work, childcare, admin down to me. As time went on his temper got worse and I was told to ‘put up or shut up’. Threatened with divorce if I questioned or pushed back.
Eventually post menopause I realised I just didn’t love him any more (death by a thousand cuts). I sort of detached from him with my own hobbies if he ever genuinely asked me about how I felt, I think that’s when I stonewalled.
I felt between a rock and a hard place. I couldn’t be honest, because he wouldn’t accept he was at fault and would only get super angry
I don’t know if that’s any help to you. I think stonewalling is when you can’t/don’t want to admit something, but at the same time are unable to blatantly lie because the original question is reasonable.
So just because someone is stonewalling, doesn’t mean they are in the wrong but they just as easily could be.