I have one of these nearly completed ( but untouched for years ). The colors I used were Testors British Gulf Armor Light Stone for the base color and and their FS Dark Tan for the darker patches. The missile launch tubes are flat back.
As for construction, It's going to need some work ( sanding, filling ), but it's not the worst I've dealt with.
I think when mine is finished I'll make a small diorama base for it with the tank running over Jar-Jar.