Bright red is a colour which really can look spot on when finished, you may have seen some old red cars starting to go a pink or chalky shade, this is down to the oxidisation feeding from the paints oils. If the car is clay bar treated first this will remove this oxidisation but then a coat of paint cleanser is added to bring back the colour and depth before the whole paintwork is sealed with a thick coat of carnauba. Unfortunatly most people just wax over the unprepared paint and seal the oxidisation in which can no longer breathe out so feeds from the oils in the paint thus sending it pink.