I'd like to do the opposite and switch my camper top from the boot that seals to the cab to a plain or screened window. My boot that seals to the cab wore a nice ring of paint-free metal nearly the whole way across the top and partly around the bottom of my window on my truck. It would be nice at times, but if you leave it on all the time each time the truck takes a bump and the cab and bed move differently that boot will rub the cab and eventually you get what I have - a very unwanted pinstripe of bare metal. I'll give it this much credit, the rust didn't start until I removed the camper top.