I tend to favor just throwing them out and hardening them off right away at the expense of a few burnt leaves initially( not the gros michels though). They're plants!... other than us suffering their looks it seems quite natural to loose all these leaves that have grown in inadequate light all winter. ..... the new ones will come in soon enough and in a month or so you'll forget about the burnt ones. Probably 95% of us are experiencing the same things trying to grow bananas in an unsuitable climate........I wouldnt have it any other way and when success( flowering) finally arrives it will be so much sweeter because of it.
Very jealous of those in zone ten!