I hate to .... in and say you're all wrong, but I'm butting in, and you're all wrong.
Noalox is a very specific compound. While certain anti-oxidization compounds might work fine on other
mods, Noalox is the best for a Reo, and there are reasons it is recommended by the man himself. Yes, your other suggestions will "work," but not as effectively or beneficially as Noalox will. Here's why:
Firstly, Noalox is meant for joints, i.e. where contacts meet in a complete circuit. As Filthy said, other compounds are meant to prevent oxidization in an already complete circuit. Alternatively, Noalox is meant to prevent oxidization in a location where a circuit is completed, like where our firing pins touch the positive battery contact. Second, Noalox is specifically designed for aluminum. It says it right on the bottle. While many mods are made out of brass, stainless steel, or even silver, our faithful Reos are milled from a solid block of - you guessed it - aluminum. Finally, unlike other compounds, Noalox does not serve the sole purpose of preventing oxidization. Noalox is loaded up with particles of zinc, which is a conductive mineral. What this means is that Noalox aids in the joint's conductivity (more conductivity = less voltage drop, better battery life, less wear and tear - see Raynman's post), while other compounds may actually reduce the overall performance of your
mod. Use other compounds only as a placeholder until you can get to Home Depot and purchase some name brand Noalox.
I hope this helps. Again, sorry for butting in, but my fellow Reonauts deserve the best.