Hello Bill,
Cannot imagine what you and family went through, vasbyt.
Most important that nobody hurt.
My method of de-rusting is to use a mix of 4:1 water and molasses.
Just done a handful of rusty calipers and after a week in the mix, stirring daily as the molasses settles, they came out with not a speck of rust on them.
A rub over with one of those Garryflex abrasive blocks, to remove any left on stains, and they are a bright as new.
I've got citric acid powder but never tried that method.
Geoff – Drawer organising marathon extended. What can I say?