I respect but do on my oldie lot. Rust fight because I've just brought diverse rust fighter. This one is one of the better sort. First, you can use this stuff relatively economical and nevertheless obtains an effect of long lasting effect. Some others I've seen in quite a short period of disintegration. The rust developed brake if applied, a robust coating that is not destroyed either by heavy rain or in freezing conditions. I inject the rust brake for video inspection in cavities and the right difuse with amazing results. So grate loses its horror. Too bad that there is no rust brake as a spray.