Hi ennio,
Have you tried the forums on cleanyourcar.co.uk? plenty of fantastic advice from the pro's about the different products and techniques used for the best results. By the sound of things you need to give your paint a deep cleanse and then seal it for durability using a wax, a nano-sealant or both. My basic routine is wash (using 2 buckets) clay, polish and finally a coat of permanon car supershine for durability ( it looks waxed for 6-9months!) or poorboys world black hole glaze and a couple of coats of Natty's blue paste wax for a super shiny finish. When done properly your paint should feel as smooth as glass, that is when it will reflect the light properly. Good luck!