I have used a media blaster for about 18 years now and have not had issues with paint be it 2K or cellulose.
Its true that the plastic media leaves a residue on the panels but it personally has not been a when problem as preparing for paint the as whole surface gets a DA and a block down anyway.
Yes media in box sections can be a pain in the neck as no matter how much you blast it with an air line a tiny bit will always find its way into the first primer coat.
I once blasted a bonnet and on the last section found a clump of filler so the bonnet was chucked outside around the back on the workshop, several weeks later there was not the slightest bit of rust on the bare metal due to the plastic residue.
We sand blast ( aluminium oxide ) rusty items and even in the workshop they will start rusting before the end of the day unless dipped in zinc primer.
We avoid sheet metal as the shot can easily distort thin steel by removing the tension, maybe a tiny spot here and there but that`s it.
The problem with acid dip is it keeps on eating away inside the seams for years to come