Magic bullet does not exist - but this paste is already close. Calcium deposits in the tub, which I previously faced helpless, could be removed without any major problems. A second passage, however, was yet due: So alongside lighter calcium deposits had formed on the edges; who fell suddenly uncomfortable after the larger, disturbing stains were removed and the remainder of the trough thus shone in most glorious white.
The application is very simple: Wipe paste damp cloth, spots or rather abrubbeln, rinse, wipe dry, finished.
Conclusion: Pure enthusiasm, clear recommendation.
*** Questions, criticism, suggestions? - I am delighted with your comments!