How to remove mortar/plaster from indian sandstone - Removing plaster from indian sandstone

[rufuscairn]

Just clearing up after messy re-rendering job on the house (plasterer sacked for a variety of reasons before reputable plasterers finished the job). Plaster has slopped all over the side path whilst the scaffolding was up and cemented itself firmly to the Indian Sandstone.

Have tried and failed to clear with my high power Karcher and am searching for another approach. Thankfully I read the warning on this site (thanks!) against using Hydrochloric Acid cleaners as that's where my internet search was taking me!

Any suggestions?

[London Stone Paving]

No comment

[RAPressureWashing]

Just clearing up after messy re-rendering job on the house (plasterer sacked for a variety of reasons before reputable plasterers finished the job). Plaster has slopped all over the side path whilst the scaffolding was up and cemented itself firmly to the Indian Sandstone.

Have tried and failed to clear with my high power Karcher and am searching for another approach. Thankfully I read the warning on this site (thanks!) against using Hydrochloric Acid cleaners as that's where my internet search was taking me!

Any suggestions?

Any chance you could put a photo on here or email one to me to see how bad this is, you might have to get the worst off by hand to start with.