Carrying on from a previous thread on a nightmare ceramic floor tile got a sample pack of Bonamain and Bonapro2. The pro2 worked best (just) obviously acidic as the grout lines were fizzing as the solution was agitated. Call me a cynic but what is the difference between an off the peg mortar and cement residue remover and Pro2??. Bona said the minimum order for Pro2 was 20 litres and cost approximately £10.00 a litre. Do not mind paying for chemicals if they are not just a revamped version of something else.
What makes this product different???
Used some honing powder under the Klindex Rocky bought from Kevin which definitely helped