I too, was familiar with the bumper and that orange polish from my time at Swinderby in '66. When I returned for a 4-year stint in '80 they were still in use until the rooms were 'carpeted' (not sure when, exactly) with some brown coloured industrial stuff similar to Scotch-Brite. I must say though, that after swinging the bumper for a while, one could get some satisfaction from a nicely polished lino floor of a job well done!