Epitaxial YBCO films with a thickness of 0.9 μm have been deposited by ex situ conversion of a trifluoroacetate-based metal organic decomposition precursor on both RABiTSTM (NiW) and MgO-IBAD Hastelloy substrates. These are potential processes for fabricating second generation coated conductor wires. Ic values, at 77 K and self-field, as high as 202 and 194 A/cm-width have been achieved on the RABiTSTM and MgO-IBAD samples, respectively.