Would you accept Necron Warriors painted a different color as Immortals on the tabletop?

I don’t own Immortals models yet, and from looking online, they look nearly identical to Necron Warriors save for an energy sword as a bayonet on their guns. Would Necron Warriors, painted distinctly different, pass as Immortals on the tabletop, and if no, would kitbashing bayonets for them do the trick?