I am getting back into Mopars after some time off. I went and looked at a car last night and it had some critters living in the trunk. I am quite sure they have been doing unmentionable things in the lower quarters!

No through rust on the outside and they feel solid. Not much room down there.

Is there a product that I can spray in there from the trunkside to slow things down? I have used POR in the past and I will likely just get a long brush but I thought I would ask.

The car is an A body Duster. I live in the desert and things look ok, but I want to stop anything without removing steel etc. obviously.

Thank you for your help.