Yup, out of some of the bigger brands around, Iron Studios definitely has on average some of the worst around when it comes to the sculpt and paint on their bases. And I should know as I?ve got about 13x 1/4, 8x 1/6, and 30x 1/10 scale Iron Studio pieces in my collection, and baring the bases on the 1/4 AOU pieces (I don?t have Vader as Popcultcha didn?t sell him) the rest are barely passable, if at all.
Their only saving grace is that their MCU sculpted figures etc are among the best around, at least in their various available licenced scales.