I would look into it a bit further sand blasting a steel boat is a big job get someone to come in from a paint shop they can check the current
thickness of your paint you may only need to water
blast and grind of the anti foul as most steel boats have three prime cotes then something like intertuff seal coat so all you have to do is go back to the seal coat and start again. If you are going to have a rust problem in the hull it will rust from the inside out, Blocked gussets timber bolted to steel , water penetration between ballast and hull in keel
, the most exiting product used on steel boats was Tar epoxy
on the inside by the time you see the rust bubble due to its hardness you have a hole in your hull , In my case lucky chipping Tar epoxy
in the marina and nearly sunk.