First remove the paint around the rusted area, grind down the rusted spot, then paint over the spot and cover the rest of your car you don't wish to paint with something like newspaper.
To repair rust damage, start by sanding down the affected area to remove the rust. Next, apply a rust converter to stop further corrosion. Finally, use a primer and paint to seal and protect the metal surface.
To repair the coating on your dishwasher rack and prevent rust and damage, you can use a dishwasher rack repair kit. These kits typically include a special coating that can be applied to the damaged areas to protect the metal and prevent rust. Follow the instructions provided in the kit for the best results.
There is no rust remover that going to repair the rust that has accumulated on a car for that long. It will be best to have the floor repaired by a professional.
Depending on the seriousness of the damage, car repair insurances will either repair the whole car (if the damage is minor), or only repair part of the car. Parts that are usually not repaired are the headlights and windows.
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If the rust is only on the outside of the microwave you can wipe it down with a cleaning agent for rust. If it is on the inside mechanics, you can not remove it without damage.
The best product to remove rust is limeaway. That stuff will remove anything staining including rust. It will not damage the actual item that was rusted. Only the rust will be removed.
Rust hole repair at body shops tend to be expensive repairs. The exact cost will depend on the area, the shop, and the composition of the car body but these repairs average approximately 1000 dollars.
You can't really repair the plastic on a car you have to replace the part. If you were to try and repair it you could use bondo but it wouldn't look as nice.
While it might be possible to fix, it is usually not worth the expense. Snapped from rust, previous damage, prior wreck damange with bad repair, whatever the cause, it's time to retire it.
This answer depends on what damage the undercarriage has. If it is just minimal rust the it can be left with some anti rust protectant. If it is bent a body shop will need to attempt to straighten it out.
I don't think you are able to fix this rust problem, take you car to your local repair shop or car dealer. They should be able to take care of your problem and fix it for you. Hope I can help.