I have got a wire brush on a long handle..they are made for doing the job that you want to do...go to ebay.co.uk....go to the gardening section and then type in "wire brush"...you will see what I mean there...I hope that that is some help to you.

Same as Rogi, I have a wire brush on a pole, shaped to go into crevices or lines between brick pavers. Mine is a detachable wolf tool to go on a pole suited to my height. Lots of others advertised and cheaper too. Replacement brushes available, just the wood and wire bit to screw into place on the pole insert.

These long handled ones are great and there is a photo of mine on the 'Gardens tool page' it has a wire brush and a shape blade on the end of a long handle, cost about £8 from a garden centre. There is also a photo of a short handled version on there too.

Thank you all for your suggestions. Just had a look at your one Drc and that looks to be just what I need.

Enjoy