I think (80% credence) that Mechanistically Eliciting Latent Behaviors in Language Models would be able to find a steering vector that would cause the model to bypass the password protection if ~100 vectors were trained (maybe less). This method is totally unsupervised (all you need to do is pick out the steering vectors at the end that correspond to the capabilities you want).

I would run this experiment if I had the model. Is there a way to get the password protected model?