does anyone know how to get mortar off upvc with out it ruining them? the house we moved into has had all the front re-rendered and the builders got mortar over the upvc and didnt think to wipe it off. Ive tried everything in the last 5 weeks even scraping it with my nail which got some off the glass but not the upvc,
the window company said hot soapy water and a scourer but i dont think thats a good idea surely it would scuff the upvc?
any ideas here guy would be great