Concrete on vinyl siding

[CLASSICPW 14]

I got a call from a pool company that needs concrete removed from vinyl siding. I haven't seen the job yet, but they said they were shooting the concrete into a pool form and some sprayed up onto the siding. I don't know why they didn't remove it then, but apparently it's dried up. Any ideas?

[bill3752 14]

If you have experience with muratic acid, mix some 28% acid 10/1 and brush on, or mix 5/1 and X jet on. Be sure to pre-rinse all areas surface to be cleaned, as well as the surface itself.

As a standard practice, I like to brush over a small spot to test the removal effeciency before going hog wild.

[timhays 14]

hot water works best.

[CLASSICPW 14]

Hot water for dried concrete?