Pick my car up in November. Brilliant black A4 Avant Black Edition. This is a two year lease so I won't own the car and aren't massively bothered about protecting the paintwork etc. However I would like to do something when I first get the car to help with future cleaning. I was going to give the car a good clean and clay bar pretty much straight away but what is the easiest & lowest cost way of adding some protection to the paint? Wax for example? I'm looking for something I can do myself without costing the earth but something that will help with water beading and making future cleaning easier. I know black is a nightmare (hence why I haven't had one in the last 15 years) so want to make sure it stays looking good for longer. Any advice appreciated.