The first grinding sessions quickly turned into worn-out discs, bald brushes,
and soot-covered faces. The days blended into a blurred continuity, punctuated
by Dinitrol and Interplus 256. Our best friends became the angle grinder and
the power drill. For the most stubborn areas, we resorted to sand blasting, but
that was definitely the minority.
I like this picture quite a lot; it shows the stages nicely: in the middle,
bare metal; to the right, covered with Dinitrol RC 900 – rust converted and
primer; and finally, on the far right (ahem), still untouched.