Originally Posted by mr4speed
Not too sure what "window channels" you are talking about. Are they on the door or the drip channels by the inside of the roof. I don't know how you are set up but I always prefer to spray the whole car apart, they come out much better with all nice wet edges.
Mr. 4 speed is correct...you get a much better job if you paint the whole car...are the windshields out of the car and is this what your talking about? If the windshields are out and you want to paint the area that the windshield fits into, you can do that but why not mask off the window opening and spray the whole car at once.