Greetings all!

My wife and I are putting in a pool/spa with a concrete patio, and it
turns out our vile pool contractor has acquired a justly deserved "F"
rating by from the Better Business Bureau during the course of our
project (long, horrible story, don't want to go into it...thanks), so I
am turning instead to this newsgroup for some useful advice.

The stamped "reddish sandstone" concrete was laid down and sealed about
two months ago. Two tracks were cut into the concrete today (alongside
the pool) to accomodate the tracks for the automatic cover. The wet
concrete from the cutting has produced a significant "concrete haze"; I
am familiar with "haze" from tilework I have done, but am not sure the
same term applies to concrete...by "haze," I am talking about the
whitish residue which is really hard to successfully remove even with
our 1800psi power washer. My wife and I gave it a pretty earnest shot
this afternoon, but were reluctant to go crazy with the power washer
for fear of doing some damage to the sealer (and it seemed we were
making only meager progress at eliminate the "haze").

How should we approach this problem? Are there products that will
facilitate the clean-up of the concrete haze? Do these products have
undesirable side effects, like eliminating the sealer as well as the
concrete residue?

Thanks in advance for any useful advice!

Chuck