How To Remove Black Streaks From Fiberglass Rv

Whether you’ve got a brand-new RV or a well-loved classic, there’s one thing we all have in common; black streaks. These unsightly marks can make your rig look decades older than it is, so it’s essential to take care of them before they become permanent.

And if you are in this situation, here is a piece on how to remove black streaks from fiberglass RV. Fortunately, there are several products out there that can help remove black lines from your vehicle.

What Causes Black Streak On Your RV

The leading cause of the black streak is water from an air conditioning unit or rain; this will usually collect on the roof of the RV and then run down the sides. In the process, it leaves grime, dirt, and other streaks of pollutants.

Several other things contribute to the cause of black streaks; road grime also is another cause of black stripes. As you drive on the road, your RV is exposed to dust, dirt, and any other form of debris. This can build up over time and leave black streaks.

How Do You Remove Black Streaks from Fiberglass RV

Thankfully, there are several ways to rid your RV of the annoying black streaks that have formed on it. To remove black spots from fiberglass, use any of the options below:

Use a good fiberglass cleaner

A fiberglass cleaner is a specially formulated cleaning agent that can help you easily remove black streaks from fiberglass. They come in different packages and often differ in usage. However, their main goal is to give you a sparkling, clean RV. Here are the best black streak removers for fiberglass RVs:

Camco Pro-Strength Black Streak Remover

The Camco Pro-Strength Black Streak Remover is highly effective at removing black streaks from fiberglass RV exteriors. It removes tough, greasy road grime, bugs, tars, and black streaks quickly and easily. You can use it on your RV before you take off on a long trip or while you’re parked at home waiting out bad weather. It is advised that you don’t use this product on surfaces such as your RV’s roof.

Duragloss Marine and RV Black Streak Eliminator

Duragloss Marine and RV Black Streak Eliminator are one of the best products on the market to remove black streaks from fiberglass. It’s an easy-to-use product that will help you get rid of those unsightly marks in no time.

This product can be used for a variety of applications, including fiberglass boats, RVs, and campers, and on rubber or plastic exterior parts like bumpers and trim pieces. Duragloss Marine & RV Black Streak Eliminator is also useful for removing other types of stains from your vehicle.

Star Brite Instant Black Streak Remover

Star Brite Instant Black Streak Remover is a powerful biodegradable, non-toxic cleaner that has been formulated to remove black streaks from fiberglass RV exteriors. It’s so compelling you’ll be able to see the results instantly. This product is versatile; it can be used for vinyl, rubber, metal, and most painted and plastic surfaces.

Using fiberglass polish

You can also use a fiberglass polish to help you polish over the black streak forming on your RV. While this is not removing your black streak, it masks it making it invisible. You can also use fiberglass to help you restore some shine to your RV.

Soap and water

This is the first option that comes to mind for many people. And for good reasons, it’s cheap, relatively easy and what you need is most likely already available. However, it isn’t the most effective way to remove your RV’s black streaks. While it can remove some, toughened or prolonged black streaks will be hard to remove with just soap and water.

Will WD 40 Remove Black Streaks From Camper/RV?

No, WD-40 will not get the black streaks off your camper. It is not a polish or wax and will only remove surface dirt; it may remove the bleak streak. WD-40 is a lubricant and cleaner that works excellent on squeaky hinges, locks, latches, and other such stuff on your RV but may not be on the black streaks from oxidation. If you want to clean the exterior of your RV, then you can use it as a cleaning agent for this purpose.

How Often Should I Use a Black Streak Remover

You should use a black streak remover only when you need it to remove streaks; this will keep your RV looking great. This will help prevent any buildup from forming and make sure that the streaks are removed when you notice them.

Black streak removers are also great for removing dirt, grime, and other contaminants from your RV so that it looks like new when you sell it.

How to Prevent Black Streaks from Forming on Your RV

If you are not a clean freak, your RV may have some black streaks on it. To prevent these marks from forming in the first place, make sure that you wash your RV regularly and wax it with high-quality wax once every year or two. Also, keep an eye on how much rainwater is getting into your windows during storms.

If too much water collects at the bottom of your window sealing and stays there for an extended period, it can cause mildew stains as well as mold growth inside the cabin. These two conditions can lead to more severe problems down the road if left unchecked. Finally, try not driving around in wet conditions when possible so that there will be no extra moisture blowing off onto your RV exterior surfaces.

Benefits of removing black streaks from your fiberglass RV

Removing black streaks from your fiberglass RV will benefit you in several ways:

  • Your fiberglass RV will look better. A regular cleaning routine is the best way to maintain the appearance of your RV, and removing black streaks is a crucial part of that routine.
  • It’ll be easier to clean. Black streaks are tough to remove by hand because they’re so hardy and can be challenging to reach.
  • It’ll be easier to maintain. Without regular cleaning, dirt can accumulate on the surface of your fiberglass RV and make it harder for you to keep up with maintenance duties such as polishing or waxing. Taking care of these issues immediately instead of waiting until they become too big will save yourself both time and effort in the long run.


You can remove black streaks from fiberglass with the right products. Sometimes using your regular soap and water will even get the job done. But if you have dried in tougher stains, going for some form of chemical remover or wax might be the best solution.

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