My next task was cleaning the silicone caulk off the front window area. I scrapped most of the big stuff off with a plastic scraper and then used lacquer thinner to get the rest of. While using the lacquer thinner, I uncovered two spots of bondo that had been painted over with silver spray paint. Not sure how the damage occurred, but the repairs blended in well enough with the oxidized aluminum that I didn't notice them. Because I want to polish the trailer, I will have to replace these two sections.