How Do You Stop White Streaks in Type A motorhomes Posted January 4, 2011 · Report reply We have an 8 year old class A with a fiberglass roof that has white streaks down the sides of the coach. We regularly wash the top (3-4 times a year) and have put Aero 303 UV protection on the top about once a year. The most recent being three months ago. We had a heavy downpour of rain recently and the white streaks are back. Any idea on what we can do? I read about black streak remover but never anything about white streaks. Thanks for any help you can give us.