Thank you for your comment
It didnt take too long. I used high temperature spray paint for the block, silver hammerite for the silver parts (eg. the crankcase and the bottom of the flywheel) and i used silver polish to clean the exhaust leg and the transom leg which worked a treat!
I didn't take the flywheel off and i just used hammerite gold to paint it (the recommend paint, hammered even better), but you have to be very careful not getting paint on the plastic top and the silver parts.
I hope you get your engine looking mint! Remember to always dry parts off which where steam clean with a hairdryer or another hot appliance, as you dont want getting excess water stuck in your engine! If your are going to take the block off, defiantly get in there with the water passages and you will be amazed how much muck comes out!
I hope this goes well for you! Alex