Depending on what paint brand you prefer
Tamiya XF-19 straight out of the bottle for the overall base color over black primer. Possibly mix in or mist a bit of Tamiya XF-20 in for some alternate colored panels or other areas
or if you like Vallejo
Vallejo 989 Sky Grey as the main overall base with Vallejo 987 Medium Grey mixed for some areas
Archive X Enamels or they now have Acrylics as well (not sure what color though, Concrete maybe?)
Army Painter has also released Star Wars specific paint sets These paints are very similar to Vallejo in quality and use
I have picked up the core set and the Rebel set, but the Imperial set has a color called Imperial Walker Grey
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Thanks for that. Ive really enjoyed working with Tamiya since using it on my Millennium Falcon and it's easier to get a hold of here in Brisbane.
That Army Painter range looks promising though so I may look into that.
I need to pick up some styrene so I will see what Tamiya paints are left on the shelf.
Looking might fine here. "We're not a Revell kit anymore!"
Black one with Imperial markings would look awesome! You are going to have to do another one now.
If I did one in black I could do it out the box as a variant... wouldn't be so challenging!