Thank you all for all your praising. It all started when I was looking into google for marble effect tiles and by mistake I found this article about "Faux marble paint". I got so fascinated, I started looking for more documentation on this subject. The best article I found was here:
I have experimented first on a second hand timber fire surround, I haven't that fitted yet in the house - but I am just posting the photos here to see the stages.