This will be my first try at bodywork, so bear with me. I plan to start fixing some dents in my sheetmetal soon, I plan to grind down to metal, then use a stud welder to pull, then lay down some filler to smooth it out. It will take me a few months I'm sure to get this done (in high humidity).
Is there a recommended rattle can product I can use to keep each patch "preserved" without rusting while I work my way around the car. I will need to paint over it later, but I don't have a place to spray two part paint right now.

Thanks