A quick note: I'll explain at the end why I think the results might be bogus!
I just used regular washers, all purchased at the same time, coated them and put them outside in the San Diego weather (which isn't much!). I was reasonably careful with my testing, cleaning the metal with contact cleaner first, changing gloves in between the different products etc.
Break Free Collector
Turtle Wax Ice
Here is the "before" picture with the products on April 13, 2014:
And a close up "before" picture:
After a couple days, nothing was happening. The zinc coating was going to protect these for a while in the mild San Diego weather even without the protectants. So as others have done, I sprayed the washers heavily with a salt solution! I did this late in the evening so they would dry slowly overnight in the cool air, not in just minutes.
Poof, I got corrosion. I waited about a week and here is the result on April 22, 2014:
And here are the same washers after attempting to wipe them off. A little bit of the crud wiped off the washers.
My assessment from worst to best:
- the control (no treatment)
- Renaissance Wax (just as bad as the control)
- Turtle Wax Ice
- Break Free Collector
Also, I'm concerned the salt spray test just isn't representative of the kind of corrosion environment my rifle will be exposed to. I'm not using it on the deck of a seagoing vessel in a storm and then hanging the rifle up wet! I'm more concerned with just time in ambient air and maybe fingerprint oils and the like. I have another idea for another test that maybe I'll try...
But for what it's worth (maybe not much given the beading issue), EEZOX and Break Free Collector crushed Renaissance Wax in this test.