Reputation is better than action

Those looking for Fertan the web, find a myriad of beautiful reports and praise about the product.
If you reread exactly then come as Remarks: "easy to apply great", "good processing ability", "it had just used, rust is gone" ....
But a rust inhibitor can not vote for a week or a month. When I edit something complicated, I want that it keeps years. That seems to me not to be the case with Fertan.
Also I used to Fertan provision that the rust was really disappeared completely and only the black converted layer was still present, and recoated with Brantho Korrux. After a year of rust was back. In my opinion, lies in the black "protective layer" the problem.