Rust converter before cavity wax

[82 sportsc]

Guys
Would like to find a good rust converter/dissolver in various body cavities , longitudinals, etc.
I have the 3m cavity wax with wand to use after but want an initial trearment that also has a wand to reach in cavities. Most I see is just bottled or spray can that will not reach.
What’s good product ?
Thanks
Frank

[82 sportsc]

I have solved this....
TPC global sells a spray gun with a 24” flexible wand with nozzle end ( wish longer but will deal with it)
Includes an integral gauge for running off your compressor.
Then you buy the rust conversion product that’s sprayable, there are several mfg’s

[962porsche]

i made my own gun with a wand using a cheap chip guard gun and a long piece of plastic tubing. i simply pluged the end of the tubing then drilled lots of little holes around the end of the tube. been using it for countless years for spraying rust converter .
in fact i have a few hoses for it to also spray SEM rust shied through it. it's the only way to coat the inner panels.

[82 sportsc]

962...
Thanks for your creative solution...those kind of thoughts also passed.
I needed the gun anyway .....but the longer length solution you have devised will be on my agenda.

I find it odd that 3m who makes the cavity wax ( aerosol only ) has not paired it with a rust converter .

All great fun !
Frank