On 28/10/2020 16:38, Dave Plowman (News) wrote:
In article ,
Dave Plowman (News) wrote:
Was grouting some new tiles, using the combined waterproof
adhesive/grout, and got called away before finishing off. The actual
grouting is fine - but a lot of residue on the tile faces, now rock
hard. Tiles are ceramic and matt finish. Any tips on the easiest way to
remove the residue?

No-one? I can scrape it off with a chisel without damage to the tile. Was
hoping someone knew a quicker way.

I find a box cutter about the right combination of flexible and blade
width for scraping off bits of set grout. The waterproof stuff once
fully cured is only going to come off by physical removal.

If you have a steady hand a stanley knife with the blade in paper
scraping configuration will give you an even wider scraper edge.

--
Regards,
Martin Brown