I would say The astro is a kitbash of BAD Droid parts ,from the looks of it It's the head of R7-T1 ,the legs of R3-A2,the center leg of R7-T1 and the body of R4-P44 .I don't believe any painting was involved but that's the great thing with the BAD droids you can make your own combos ,nice customs AFE!