if all you have after blasting is some surface rust, not a big deal. No guarantee even that'll show up & if it does it can be sanded off w/a DA easily. WIll your car be inside? If so should be fine in bare metal. Mine sat in my garage for months as bare steel, no rust appeared.

If you have deep rust or pitting use a wire wheel on a drill & you'll be surprised how much will come out.

Start investigating paints to use, all the majors are going to be expensive, PPG, Dupont, etc.. I assume there are other brands over there that are just as good but less expensive, see if you can find those & as a rule dont use anything from a spray can.