Grey Knights Dreadnought
I decided on a black undercoat. I used a GW black spray.
When I was at GamesDay 2006 I got a couple of weapons for my Grey Knights Dreadnought from the Forgeworld stand.
I got a Psycannon...
and a Mortis pattern twin-linked Lascannon weapon.
Yes I know according to the rules and fluff that this is not a "legal" combination, but when I have ever followed the fluff! It was a slightly beardy choice, as generally my opponent uses a lot of tanks, therefore a Dreadnought Tank Killer is a better choice than a close combat version and I don't like the missile launcher weapon variant.
Both weapons came with small amounts of flash, the Psycannon targeter has a small amount of sprue to be removed, see the red shaded area.
The Lascannons had a much bigger piece of sprue see the red shaded area (which looks small in this photo) which took a bit of cleaning to get off.