Beginner needs advice for a project.

[Curator]

I am a complete amateur to the car world, I never used to like cars till I found this old 1967 Volvo 122s, Ive been told by a friend that I should just get some of your Rust Encapsulator and sand down my car then wipe the dust off and paint it on, two layers, then put a normal primer over it then get it painted...

Id like to hear your advice on it, especially on how much rust encapsulator I will probably need, and any other advice you may have for me, the more details the better since im new at this... also there is a small amount of cancer in two spots, not to bad yet but looks like it could get bad soon, any advice on that would be appreciated as well! Thankyou for your time.