One of the houses which i clean, has had testa teres rendering done a couple of years ago, when i first got the job, i noticed a couple of runs on the panes when i was pricing up, i thought these were the remnants of an egging attack. But actually it is the polymer part of the render that has run down off the wall onto the glass and then cured.
I have scraped 60% of this off with a 5 inch champion scraper, but there is still some left on the glass that simply wont budge.
Does anyone know of anything that will take this off the glass, and where i can get it from?
Many thanks in advance
Jason, Fleetwood Window Cleaning Services