Well, you're right about the first one... expensive bags that probably work as advertised. I've found Lee Valley to be pretty honest about their descriptions but a few items they carry aren't quite as good as they make them out to be.

The Evapo-rust looks interesting, I may just pop in to my local Lee Valley and pick up a quart to see what it really can do. I have 3 or 4 junk razors that won't be worth the effort to restore and one that is but I just have not found the energy to have at it... If I give it a shot I'll be sure to post back how it went.

Regards

Christian