Hello Partners and thank you in advance for any help you give me.  I have an outdoor project coming up on outdoor travertine patios that have a buildup of a salty substance on the first floor.  They have copper rain gutters that must overflow  and the mixture of the rain water , copper and the calcium of the travertine causes  a "mound of a course salt substance" to form.  Sorry I have no photos.  I was going to use a hammer and chisel at an angle to break the deposits from the travertine and then use diamonds to smooth the surface.  I was wondering if a moderate acid solution should be used on the deposits first to help break them down?  My goal is only to go as high as an 800 diamond-encrusted pad since it is outdoors.