Frame connectors US Cartool need help.

USCartool is awesome. I ordered the connectors on Friday the 19th and they were delivered today. I read the instruction sheet and they say put the car in the riding position, weight on wheels, when welding them on.

I still have a couple of questions, 1) Do you really have to remove the seats, front and back, and the carpet? 2) How do you keep the inside of the connectors from rusting, once installed? If you paint them, inside, prior to installation wouldn't the welding make the painting worthless?

You will have a fire if you don't remove the carpet, seats, sound proofing inside the car and undercoating where you will be welding. Trust me.