Perspex can be polished without all the hard labour. Im fairly certain that one of the metal finshing supply houses, probably Lea in buxton,though it might be Cannings,do a greaseless polishing compound specifically for perspex. Ive used it a few times,and it seems good. You just have to keep the mop clean,and not let it get clogged or hot. Cant remember the name though…. Its yellowish…. Going to bug me all night now….