The Medway Handyman wrote:
Got to do a fair bit of pointing soon, old stuff pretty crumbly so I assume
the best tool is one of those wheelie things with a nail in it? Rather than
the TCT rasps for angle grinders? They look a mite tricky to control?

My bricklayer reckons you should just put a screw in a piece of batten.
But that is assuming lime mortar which comes out quite easily.