buy some plastic sheet and install to door metal skin after you are done with the windows and cleanup treatment. have a look at this thread and see what the user syncview did.
https://www.pakwheels.com/forums/body-work-interior-paint-glass-appearance/224778-door-vapor-barrier-2
This plastic is very important in every car. All go missing in Pakistan and the stupid "seat cushion works shop" install plastic on the finished panels making them fell like a 4K 4D, 2K bus interior.
you will need to make a plastic sheet "curtain" for the power window motor too - this curtain actually would drape over the window motor so water does not flood and damage it. It is stuck to the larger sheet of the plastic - pretty simple