Time was when luxury car manufacturer Bentley would have turned down a customer request for a pale pink-painted model. Since then, US model Paris Hilton has been seen at the wheel of a Barbie pink Bentley she had sprayed to suit her unusual taste and now the noble brand has opted for visual overkill of its own. Bentley has launched pastel-coloured limited editions of three Continental GTC Speed convertible models in hues and finishes that “recall the golden age of Hollywood.” It seems the maker hopes to mine a glam tradition in the upmarket district of Los Angeles that goes back nearly 100 yea…