svp07 14 Report post Posted July 3, 2007 Before and after...acid washed and 1800 psi cold. pressure alone cannot remove black crust unless you're into resurfacing. Share this post Link to post Share on other sites
0 Beth n Rod 1,279 Report post Posted July 3, 2007 Wow! What a difference! Beth Share this post Link to post Share on other sites
0 Tmrrptr 164 Report post Posted July 4, 2007 Looks great! Did you use muriatic acid or phosphoric acid ? r Share this post Link to post Share on other sites
0 svp07 14 Report post Posted July 5, 2007 Hydrochloric Acid. Share this post Link to post Share on other sites
Before and after...acid washed and 1800 psi cold. pressure alone cannot remove black crust unless you're into resurfacing.
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