So, i have a small spot of rust on my back 1/4 pannel, how can i remove it?
Friend told me naval jelly(i think) and then weld a small piece in and smooth it out

Also, theres a small part on the edge of my door that is starting to rust, it has not created a hole or anything. Could i rub this naval jelly on it, primer it, and paint it?

edit: since it is maybe only dime sized, would bondo be just as easy?