Never polish durabrites when HOT or warm, due to the protective coat is soft, Never use any form of abrasive cleaners eg( autosol,peek,white diamond) use washing up liquid a nd sponge, you use normal wax polish on them to help repel the dirt/grime, even dash board spray.
Dura-brights always look a bit dull due to the coating.
As the advert says “clean and shiny with soap and water”