Salitre

I posted this under Home Repaires but no one seems to have seen it so I will try here;

I have some salitre in and outside my house. I usually fix it myself but I'm getting old and thought I should get a "professional". Does anyone know of someone who does a good job? My regular fixer uppers are, too busy, sick, or taking it easy now. I've heard that there are some new improved products to at least hide the problem for several years.