I feel that 'to the untrained eye' is somewhat overused or cliched, and I think that a variation or an equivalent might improve my passage. The relevant portion currently reads:
To the untrained eye, these men looked every bit part of the scenery, but it was in the details that one unearthed the truth, and...
I think a lesser-known construction (an equivalent phrase) could work better, or even a small change, such as changing 'untrained eye' to 'inexperienced eye' would make it more original. Basically, I'm looking for an alternative and would appreciate suggestions.
(If this would be better homed on writing.stackexchange, please let me know and I'll move it.)