Technical Gas under paint

I over filled the tank on my 58, and gas got under the paint. It formed an actual blister the size of a base ball. I had to drain it, so I poked it with a pick, the paint blister tore and made the attached paint droop. Now I have bare metal. I'm not a body guy (yet) and I need some tips/advice, about sanding this area, and applying primer to avoid rust.

 

What kind of paint is the white? Looks like an enamel of some sort.
The extra Ethanol in gasoline is great for this problem. Remove the paint in the whole ( panel) area and use a good prep cleaner before priming and repainting.
A good straight razor blade works good for removing paint. Aircraft paint remover will remove the rest.

 

Id pull the cab and repaint from the door jamb and blend it into the rear cab where no one can see. Did you paint this truck - know the paint code and paint type?
If not, you may talk to some local scratch and dent places, you prep, they color blend and shoot. May also check if local paint stores can scan the color.
For an immediate primer job, leave the bed on and sand the damaged area to bare metal, feather your existing paint, shoot the primer, might try to find white epoxy so it doesn't stand out as much. You could just brush it on, you'll reprep the whole cab corner when you match the paint up later.

 

That is a bummer. I had the same thing happen a few years ago. I agree with indyjps. Sand, feather, prime and repaint. All will be good again.

 

Just not so sure about pulling the cab just for a patch job though.

 

looks like enamel to me as well, any time you get fuel on it you'll get that reaction, try and find a body shop who'll touch up just that bit with a better paint, can be done without pulling tray off.

 

You wouldn't pull the cab to do it, pull the box, that is much easier and you have the access to fix it right.