Window plastic thingy
I have several large windows that slides open horizontally. The frame of the window is the typical extruded aluminum but the window itself slides in a plastic channel that snaps into the aluminum extrusion. While the plastic track is inserted into the aluminum frame there is a lip portion that extends over the aluminum frame into the interior of the rv. It is in this extended plastic lip that the bug screen slides back and forth.
I'm working on the rv to fix up before I take it out in rain. The plastic lip has some broken plastic off. Where and how can I fix that plastic channel?