Originally Posted By: George7941
I find that any grease like product works well for a while and then it becomes saturated with moisture and salt (I am in the salt belt) and it actually begins to promote corrosion. What works are light oils like Fluid Film and Krown, which, because they are renewed annually, stay relatively contaminant free.
Please explain to me how light oils "stay relatively contaminant free" and grease wouldn't? Annual re-spraying doesn't renew anything, it simply puts a fresh coat of oil on top of the old one. And have you actually inspected your undercarriage after only one year of being sprayed? It's filthy and black as tar. Meaning your next coat simply covers all that dirt, grime, salt and everything else that got stuck to it. Grease will do the same. Yet is still works as it should and prevents corrosion.
Originally Posted By: doitmyself
Take some silicone grease in your palm, hold it under running water and mix it a bit with a finger. Water will literally jump off the grease. Take some common lithium grease in your palm and do the same thing. The grease will turn cloudy and milky from the absorption (actually emulsification) with the water. I also tried this with SilGlyde and it performed similar to lithium, maybe a tad better. Do you want a salt laden grease sponge sitting on your steel?
Don't believe me? Try it.
Well, spray some FF or other rustproofing oil in a container, put some water in and stir. The exact same thing will happen. Why is it of little importance? Because the rustproofing oil, grease or whatever is simply sitting on the surface and is not being mechanically agitated and mixed with water.
As I mentioned above, after just one year of driving with the undercarriage being sprayed, the coating, whether oil, grease or wax, will be filthy and full of contaminants. The next coat will simply cover all that and I have yet to see anybody completely remove the old coating before applying a new one. Why invent problems and theories here about salt contamination? It's based on nothing more than feelings.