I Just went through this on my sub. On an AD sub the windows in the doors have stainless trim around them but the sliding side windows have painted trim. I removed the painted ones and had them chrome plated so now all the window trim matches. When putting them back on I used a rubber mallet and carefully tapped them into position. I started in a lower corner and worked along the bottom. After I got the first corner in position I very carefully bent the trim upward until I could get it started in the opposite lower corner. Have to be careful not to kink it. Once the two lower corners are in the rest of it goes easy. Have to make sure you start with the correct end so when you get to the top the ends overlap properly. And they like to flip around a lot when you try to install them. Weeds