Advice Needed On Removing Paint From Sandstone

A friend at work has recently removed a fireplace from her dining room revealing the original sandstone lintle. She wants to keep this as a feature but unfortunately some of it is covered in black heat-proof paint.
She's tried Nitromorse on a small area without much success (and is worried about this damaging the sandstone). She's also tried a wire brush but while this removes some paint it also greys the sandstone. Sanding it off is also not really an option as the surface is uneven.
Has anyone any suggestions on the best way to remove the paint, hopefully without doing too much damage to the sandstone?
Many thanks,
Chris
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chrisj@?.d.s.l.p.i.p.e.x.c.o.m writes

not a diy job but you can have it blasted off, there are systems on the market now that enable you to wind up and down the pressure of the unit to remove individual coats of paint a a time
--
David

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chrisj@<spam not welcome>.d.s.l.p.i.p.e.x.c.o.m wrote in message

I removed patches of paint from my sandstone floor with a strong caustic soda mix. Some scraped off with a sharp scraper, and some with rough wet and dry. Wet and dry is also good for smoothing off and diguising the scrape marks.
J
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