getting plaster off of flagstone

Apr 13, 2011
7
Ok, pool was re-plastered last week, seems as the crew was a tad sloppy, some areas of my flagstone coping have white residue/plaster on it. What is best way to remove? Power sprayer, scrub brush, chemicals etc., thanks!!
 
Plaster crew has been back several times, they just still cant seem to remember to get it all off..... I would prefer at this point to do it myself so I know it is done right. Any tips would be great, this is more of the plaster dust, not think plaster like on the pool shell, just a mess on the coping.
 
That's why I didn't mention using acid as it's most likely going to leave a spot no matter how dilute you make it. Try a Magic Eraser or a piece of Scotch Brite. They'll be a lot of work but they won't harm your stone.
 
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