alternative to waxoyl ? Shell Ensis ?

[jimmyspeed]

I've got two cars to rust proof underneath and have been trying to find a better alternative to the prehistoric waxoyl that I've been using because its free

The Dintrol products look good but are expensive so i kept looking and found a post on some mg forum (rust experts) and a guy was recommending Shell Ensis V

This lead to these 20litre barrels which will be plenty and although a fairly large investment its the same price as the equivalent waxoyl and hopefully better

so anyone used this stuff? or can recommend a better product in big quantities?

http://www.smithandallan.com/prodpage.aspx?id=2128

there several different types ranging from 80 to 90ish £