accord/acura door seals/wipers

scouts honor: if you do not felt these how may months in general b4 verticle scratches show up?
i do 5 to 10 of these a month for a dealer. i have my own special way of doing them that dosent require bending, cutting,hacking or felt/moleskins/velcro, or spending more than 2 dollars a year.
i havent had a redo yet going on 2 years due to scratches.
Either i am doing something right or im due for some serious warranty work.

working late tonite. just pulled all 4 panels, treated the wipers and pulled the qtr glas in 8 min.

We offer felt to all our customers and most don't do it. The acura's haven't come back yet. Had a couple of accords. But every Mustang has come back to pay for felt and R&R tint.