Cavity wax recommendations

[arginite]

I want to stop the rear subframe of my MR2 rusting (http://images.tapatalk-cdn.com/15/11/22/728b63d70b88f8a8ddc217c857f7b538.jpg)
As it's really just a big enclosed box with some small holes what would be the best product for the job?
See link above for an example of the subframe.

[Belle427]

Bilt Hamber stuff is very good.
This is for cavities etc.
https://www.bilthamber.com/corrosion-protection-an...

[Dr Doofenshmirtz]

I used Waxoyl in and on mine. But don't do it this time of year because it's far too cold and the Waxoyl won't soak in properly. You need to wait till it's properly hot in summer.
In the meantime, use ACF-50 to protect it.

[Evolved]

Dinitrol cavity wax, mine is soaked in it.

[arginite]

Thanks guys