Bona Pro 1 is a penetrating anti slip cleaner for porcelains and ceramics.
Bona Pro 2 is hydrochloric and surfactant blend for gross contamination
Bona Pro 3 is the one that has Nitric in it for heavy salt build up.
We use 2 most of the time unless its wet change areas when we use 1. We have quite soft water up here so 3 doesn't get to play all that often unless its a hydrotherapy pool with added health salts.
These are VERY agressive products for professional renovation use only and as such aren't available online. Call me if you would like to discuss or order on 01334656787 or
jamie@cleaningsystemsuk.comAs Kevin says sometimes a high alkaline boosted with honing powder may be all that's required. Honing powder can also be used with the Pro 2 & 3 should it be required.