fire damaged rock

[Tomas Lipps <tmlipps@zzzzzzzzzzzzz>]

first let me say that I appreciate the expressions of condolence I've
received from George and others, however, that was a query I received
 from someone else that I passed along to the list for advice.  it was
not my father that died in the fire.

second, thanks to all who offered advice.

John Twilley's suggestion of blasting with shells seems a good thing
to try. I've heard by the way that that's a good way to eliminate
stun marks from stone.  never tried it, has anyone?

"traditional stonecleaning acid. . . in crystals?" is that something
other than muriatic acid, George?

whereas Charles suggests "alkaline-based chemicals with a pressurized
water rinse. hmmm., carbon versus acid, or carbon versus alkili

  good to know about  http://www.traditional-building.com/rte.htm

as to the severity of the damage, I'm under the impression that it's
"just" smoke build-up, but I've asked.  asked also about the rock
type.  I'm passing along these recommendations and will suggest that
she consult with masonry restoration professionals in her area, if
there are any.

if I learn anything further, I'll post it here

thanks again

Tomas