Hi, all. This is my 1st post on model shipwrights, because I am building my 1st submarine. I am wanting to know the correct color for a German type XXIII coastal u boat. Trumpeter's painting instructions say medium gray. Tamiya medium gray and Model Master Medium gray are very different. So, which is correct? or is there another more correct color?. I have seen green armored vehicles that Trumpeter says to paint Tamiya XF-20(medium gray), so I am not all that confident in Trumpeters instructions. Thanks, Mike