All bare metal should be primed before painting. All metal should be covered with primer, paint, or another appropriate sealant to protect from rust. [5] X Research source
Substances you can use to remove rust include steel wool and acid, depending on where the rust is located on your car. Be very careful using these products, and talk to a professional if you are not comfortable using them yourself. [7] X Expert Source Angel RicardoAuto Technician Expert Interview. 1 October 2019.
On the end, a hole in the floor will mean welding a patch, priming, and painting inside your cab. This can be a huge project that takes a lot of time.
If there are any cuts or gashes in the upholstery, you can try to repair them. If they are large or you have multiple damages, your seats may need to be reupholstered. Stains can often be removed by cleaning with appropriate stain removers. If you can’t get the stain out, you may consider reupholstering the seat.
Check your transmission fluid and add some if needed. If you’re restoring a manual shift car (which is likely), check the clutch to make sure it is working properly.