Talk to 'em, ask how they intend to repair you car before they commence. If you're not happy with their plans, now's the time to tell them. It's what I did when my missus took out a dingo at 180kph, they wanted to glue my front back together, I said NO, back and forth with the assessor, but new bar in the end, so all's good. (The panel beater actually helped me argue with the assessor, good bloke.)