Did you clean the surface before you applied it? Anytime I apply trim product I give it a good shot by cleaning it with APC and scrubbing.I thought the same thing as well, but it wasn't dirt from the paint. When I tried wiping the streaks away with a microfiber, they remained. I put another coating of the trim restorer on and the streaks are gone. The trim is currently nice and dark and evenly colored. Waiting for the next round of rain today and tonight and hoping the week that this has now been on has been enough for it to "cure". We shall see!