Which paint colours are the most durable?

I intend to buy a new car and keep it for a long time. Please advise which paint colours are the most durable.

Will washing up liquid stop paint from sticking to my tyres?

Does washing up liquid prevent overspray on tyres fron sticking ?

Is there a standard for paint thickness?

I have recently purchased an A5 Sportback and noticed quite a lot of chipping occurring to the leading edge of the bonnet after only 8k and less than a year old. My dealer measured the paint thickness...

Do scratch remover products work?

There are many products that advertise the simplicity of masking or removing scratches on bodywork. Are they as magical as purported to be and if so what product would you recommend?