I know there will be many who will think I am posing a silly question but bear with me. Some years ago I went to see a friend's 1931 Austin. He is only the second owner. In its 77 years, it has only been washed and dried, never polished or waxed. It looks as fresh as the day it left the factory. So when my wife acquired a black Fiesta some 7 years ago, I decided to experiment and treat it same way the Austin was treated. That is, washed from time to time, sometimes with a proper car shampoo, more often with a dash of Fairy Liquid. I am now getting it ready for sale and believe me, the paintwork is like the day it left the factory. By contrast, my black ML has had expensive, top of the range polishs and waxes applied on a frequent basis and in all, properly detailed. Guess which car has the freshest looking paint-yes, it is the Fiesta. It is, of course, possible but unlikely the Ford paint is better quality than the Mercedes. So that brings me to the conclusion that polishing and waxing could well be a waste of time and money.