Need name of chemical that works with powerwasher to remove soot from walls after a fire

r body shop caught fire & left black soot everywhere so how do I get rid of it
pennybonnville56
Asked Mar 10, 2013
Trisodium phosphate (TSP)

http://www.youtube.com/watch?v=kxiUOtVCluU
Rob
Answered Mar 10, 2013

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