I have found the best penetrating spray there is. Kroil is better than anything you can find on the market. You can’t buy Kroil in stores because its only intended for industrial use and only sold to factories. But I was able to buy it from the Eastwood Company.
http://search.eastwood.com/search?w=...st%2BSolutions

 

Anyone try this stuff yet?

 

My old man has used it for decades. It's hard to find locally sometimes for me though. Great stuff. It works better than any other penetrating spray I've ever seen. If you can find it, or have it shipped, i'd recommend it.