[King]

sounds good, especially if it can be spray or roller applied. I have concerns over yellowing over time and the effect of hot summer sun on it, walls can get pretty damned hot and it may have a negative effect.

Ease of removal and if it penetrates the original surface (creating issues when repainting is needed) are considerations. Maybe a special base coat would be needed first?

I know there were non-sacrificing products on the market about 20 years ago, but would have no idea now, so your research is likely right.