Brick cleaning grinding disc?

Just watched one of those challenge Tommy Walsh programmes on Discovery Real Time. He needed to clean some old bricks of paint and used a large grinder that had a disc with ribs/grooves on the face which ran over the face of the bricks and cleaned them. Looked great, anyone know where to buy such a disc?
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snipped-for-privacy@localhost.com wrote:

Probably a flap disc

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Not one of these ?
http://www.screwfix.com/prods/16576/Abrasives/Other-Cutting-Grinding/Grinding-Cups/Norton-Diamond-Grinding-Cup-100-x-22-2mm
http://tinyurl.com/2sv49y
Simon.
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Nope, it looked like an ordinary masonry cutting disc except the face of it had diagnol ribs going across it.
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Was it like this?
<http://www.toolstation.com/shop/Abrasives/DiamondBlades/d130/sd1450>
Was it dished with a depressed centre?
cheers, Pete.
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I think this might have been it: http://www.screwfix.com/prods/18886/Abrasives/Other-Cutting-Grinding/Fibre-Discs/Universal-Semi-Flexible-Disc-115-mm
looks the same, although his was bigger
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http://www.screwfix.com/prods/18886/Abrasives/Other-Cutting-Grinding/Fibre-Discs/Universal-Semi-Flexible-Disc-115-mm
*Everyone's* looks bigger. It's just the direction you're looking at it from. ;-)
Tim
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http://www.screwfix.com/prods/18886/Abrasives/Other-Cutting-Grinding/Fibre-Discs/Universal-Semi-Flexible-Disc-115-mm
Should only be looking at the wall!
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snipped-for-privacy@localhost.com wrote:

Grinding discs are a great way to ruin brickwork. Paint gets in the pores, and at 11,000 rpm a grinder disc of any kind is far too fast to get into the pores, unless it just rips them off. Totally the wrong approach imho.
NT
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