Hi all, been a long time between posts, flat out cleaning! My main source of income down here is acid washing (muratic) brickwork on new houses, and business has been good.... until now! One of my main builders has been approached by a bi-carb soda blasting company who claim they can do exactly the same job as me, without any possibilty of staining or pressure damage to mortar joints (not that we get any damage, but you do see the unforeseen stain, eg efflorescence). Does any one have any knowledge on soda blasting and what are the problems that may be associated with it? I need some ammunition to go into this builder to nutralise the idea that this crew can do the same as mine. Any help appreciated. Brett