Hi Ed,
I use Mike Sander (grease, needs to be heated to 100°) or FluidFilm (oil, various thicknesses) for all my steel bikes (and my car). I spray it with a compressor and gun ...or go with an aerosol can FluidFilm AS-R. The aerosol can is of course by far the most convenient for a cyclist. The can comes with two nossles. With one of them you can spray through the little holes that non sealed frames have in rear triangle and forks. For an additional euro you get a 60cm long nossle. With that piece you can do seattube and toptube from seattube out (if hole is large enough). Downtube can be approached through the bottlemounts. The stuff will creep forever as it never becomes solid. A 40 µm layer will be left that doesn't wash away easily.