Anti-Rust Test

Before starting work on the fuse project, i tried to figure out, before final painting, how to preserve it from rust! Tube and steel sheet are coated with oil  that protects them from rust, but when we work on them, we need to clean some areas, and than steel is completely exposed to moisture. 
To prevent rust forming some precaution should be taken. There are many products out there that can be used, i've tried some...and these is my upshot!
The best result about rust prevention respect money saved was obtained whit a WD40 can. After two years of exposure to moisture, here we are..I've generously done only two application! of course, only on the upper surface of good piece.