FWIW, I've soldered a few 0402 components using a sharp-tipped iron. I melt a drop of solder on one pad, then with tweezers (and a microscope) hold the 0402 in place while I re-melt the solder. I then solder the 0402 to the other pad. It's a bit hit-and-miss but I usually get it right on the first try. I don't know exactly which tip I used, I've got a few different irons, but it's fairly small.