Black Streaks (Under window) up date
OK, I have tried everything everybody suggested. Star Brite from west marine, mean green mildew destroyer, awesome, Mcguiars marine RV one step compound, and others. Seems like the Star Brite removed ...
Forum Discussion
Do you wash / wax your RV regularly? If Awesome isn't taking it off I'm thinking there was a very light coat of grime that you've sealed in over the years with wax or polish (especially if you use a polymer wax).
The solution for fiberglass RVs is straight forward but a lot of work if, as you found, the one-step stuff isn't enough. You'll quickly realize just how big your RV is...
1. Wash, including the roof since this is where most of the dirt you see comes from
2. Meguiars Mirror Glaze #49 Oxidation Remover & Heavy Duty Cleaner
- this stuff is a light rubbing compound specifically made for fiberglass. It will take previous wax off as well as the trapped dirt and any oxidation you're seeing. They have more aggressive compounds but you likely don't need them (plus the take more work and remove more)
3. McGuires Marine / RV #45 Mirror Glaze / Polish
4. A good coat of wax. I like Meguires Flagship Premium Marine Wax
You don't need to use Meguires but this is what I use and it works. Others make similar stuff, just make sure you buy stuff made for fiberglass vs automotive clearcoat (usually says its for boats / RVs and / or airplanes). I suspect that once you do the black streak areas they'll look shiny and new, making the rest of the RV look like you gave up before you finished the job. If you choose to do the whole thing I suggest working in sections. If you've got lots of decals, graphics or vinyl decorative stripes you'll end up having to do a lot of the work by hand vs a polisher since the polisher can damage the vinyl. Good luck!
The solution for fiberglass RVs is straight forward but a lot of work if, as you found, the one-step stuff isn't enough. You'll quickly realize just how big your RV is...
1. Wash, including the roof since this is where most of the dirt you see comes from
2. Meguiars Mirror Glaze #49 Oxidation Remover & Heavy Duty Cleaner
- this stuff is a light rubbing compound specifically made for fiberglass. It will take previous wax off as well as the trapped dirt and any oxidation you're seeing. They have more aggressive compounds but you likely don't need them (plus the take more work and remove more)
3. McGuires Marine / RV #45 Mirror Glaze / Polish
4. A good coat of wax. I like Meguires Flagship Premium Marine Wax
You don't need to use Meguires but this is what I use and it works. Others make similar stuff, just make sure you buy stuff made for fiberglass vs automotive clearcoat (usually says its for boats / RVs and / or airplanes). I suspect that once you do the black streak areas they'll look shiny and new, making the rest of the RV look like you gave up before you finished the job. If you choose to do the whole thing I suggest working in sections. If you've got lots of decals, graphics or vinyl decorative stripes you'll end up having to do a lot of the work by hand vs a polisher since the polisher can damage the vinyl. Good luck!
