Was mooching around Aldi before
 

And came across a kit of abrasives and it had one o these in the kit
http://tinyurl.com/4o5dk2
The kit cost £6.99 and the cup brush knocks spots of getting flakey masonary
paint off brickwork...only problem is you have to wear a set of overhalls
protection glasses and a mouth mask,common sense really. :-)