i have just rust proofed my wb with dulux fishoil, every single panel i could get to, Yes it does stink, but my old man sprayed it on his car in 1981 as we lived on shaving point in metung, salt water on both sides of the house with in 20 feet, the car still does not have a speck of rust anywhere now and it still on the original coat sprayed inside all the panels. over 30 years later!