Black streaks
Sorry ,I didn't get back to you sooner. I had a busy day. My second cousins baby shower ect. Go ahead and apply the gel gloss to the trailer. It won,t set in the staines. We use micro rags dedicated for this job. You will find dirt on your cloth. Just read the directions on the gel gloss and follow.Your trailer will be nice and shiny and protected. Be very careful about using a power washer on your trailer. It can be too powerful and do dammage to your roof ect.