[theastronaut]

We were in the same situation with an F100 hood a few years ago. The battery had exploded and the inside of the hood had deep rust pits that sanding alone wouldn't remove. We used repeated soaking with naval jelly and scrubbing with wire brushing to remove all the rust without resorting to blasting. It took a couple days of soaking and scrubbing to get all the rust out. Once the rust was all out we used scuff pads and PPG DX579 and DX520 to neutralize the naval jelly and prep for epoxy.