What is the best mortar remover?

This question was asked by
Richard Hogg

I am in need of a non acid based mortar remover to apply to a newly laid black/blue limestone patio, is the Green klean industrial remover suitable??

If you are worried about damaging the stone I would probably suggest using the Ecoacid rather than the Green Klean, it will do the same job but it is not as aggressive as the Green Klean. (link below)

Drew Palin