Sleeka....as your in Essex i would point you towards these guys: http://www.lepsons.com/ they did mine almost 4 yrs ago and they still look good, they charged me £50 a wheel and were powder coated and polished but they will if you want keep to the natural Lexus look but with a much better finish. :D
I left mine with them, did a bit of shopping and visited family and were ready at the end of the day!!
Oh and they do a collection and a one day turn around.