hi ..not sure what kia use but we got DIAMONDBRIGHT from the dealer yes its expensive but you get 2 bottles one shampoo and one wax put a capfull into a bucketjust wash with shampoo and wash with wax then buff up ..it brings my black echo up a beaut ...only downside it leaves windscreen greasy so i clean it up with other stuff hope this helps ..barry
Got mine done with 'Glare' paint treatment at the same time as the front end wrap. Only have to wash off with water and dry with a microfiber cloth and its filthy to shiney in 20 mins, including wheels.
Ive used Harly wax on my cars for the last 6 years.Not cheap at £19 a tin but have done both cars twice a year thats all it needs and still got half a tin left.
Gives a really good shine and the rain just runs off the bodywork.
you can get it off e/bay.