@ DickBarton - will take your advice on Jenotite - any recomendation RE jelly vs liquid?
I usually use the jelly, but I don't suppose it matters which one really. The layer which forms when you apply the Jenolite is Ferrous Phosphate,if I remember my school chemistry properly, which is rust proof - in principle - but after a while this surface will rust again if left exposed. This is only a temporary fix/measure to stop the situation getting worse - it won't cure it.
I usually use the jelly, but I don't suppose it matters which one really. The layer which forms when you apply the Jenolite is Ferrous Phosphate,if I remember my school chemistry properly, which is rust proof - in principle - but after a while this surface will rust again if left exposed. This is only a temporary fix/measure to stop the situation getting worse - it won't cure it.