That was an experiment for me mate. I bought a new/unused ACH in "Foliage" (so a US contract/issue item) for three reasons, one it was cheap (came with NV mounts, ACU cover etc), it fitted me and, importantly, Foliage Green was NOT the colour that the Australian Military bought, they got Tan and Green. I could not them ever be accused of having a stolen brain bucket. The inside remains the original colour and I sprayed the rest up after some careful applications of tape.