Hi,

I recently had a boundary wall replaced, and the builders were a bit
messy with the mortar, and the short driveway is looking very messy.
I was intending to get it off while it was fresh with a power jet, but
a couple of days of hard frost later and the morter is well hard. I
know from experiece that using a high-presurre with a "pulsing"?
nozzle is great at cleaning /removing but this is too vicious and
breaks up the surface of the tarred driveway.

I will eventually be replacing it but is there a quick/easy way to
remove the mortar off without affecting the softish tarred surface ?
I recall reading that dilute Hydorcloric acid eats cement - but what
would it do to tar ? ... and can this simply be washed down and
diluted flowing into the street/drains.

--
Ham