I notice rust blisters showing up under the vinal top of my 68 mustang. I pulled the top off and found that there was no paint under the vinal top. It looked like someone had taken a wire wheel and removed 75% of the paint down to bare metal. I have rust everywhere. The pitting is bad in some spots, but has gone through in only one small spot. I'm afraid to try and sand all the pits out because I might remove to much metal. Is it okay to clean the pits out the best I can with a wire brush and then try to neutralize the rust with ospho? I'm thinking of putting another vinal top on. Is it okay to just primer the top and window wells and then put new vinal on?

Thanks for any help