i have rust spots in place i cannot sand down or spray over... would it eventually eat my vehicle away?

 

yes

 

take the whole aea off and replace with a new oem part or a custom made one.

just what I learned in the rust city . you cant beat the rust with those rust killers and other scam products in the market. unless you sand blast the thing.

 

I have had decent luck with Navel Jelly, it works really well on surface rust, anything deeper, its replace or cut/weld