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Old 12-08-2021, 10:51 AM   #1
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Fiberglass Roof Oxidation

Has anyone found a cure for fiberglass roof oxidation that bleeds white streaks down the sides of the motorhome? I have a 17 Ventana with a white fiberglass roof. I have washed it and then used boatwax/sealer to try and stop the bleeding. It helped for a short while but started again. You would think someone would come up with a product that would seal the fiberglass and stop the oxidation. Anyone have any luck with this issue
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Old 12-08-2021, 10:58 AM   #2
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Rustoleum Top Side Paint. Clean to roof well mask off around the perimeter and roll on two coats. You won’t have to touch it again for years except to wash it with a soft brush as you feel the need. Did mind four years ago and it still looks like I did it yesterday.
I know many folks put different waxes etc but for me the last thing I want to worry about is waxing the roof twice a year.
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Old 12-08-2021, 12:09 PM   #3
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Like Steven said, this is a great way to go. I did mine 2 years ago still looks great.
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Surface Preparation:
Determine if you need to remove any of items on the roof; ACs, solar panels, etc. Normally this should not be needed given those areas receive literally no sun damage. A thorough cleaning with a pressure washer should suffice. Inspect the condition of the Dicor sealant used to seal around the roof items. If there are significant cracks you should consider adding another coat of self-leveling Dicor to these areas. Pressure wash the roof with Simple Green to remove the dirt. When dry, lightly scrub the roof with 3M Red Scotchbrite scuff pads. These are available on Amazon, auto paint stores, and some home improvement stores. This will slightly roughen the surface to promote better paint adhesion. Next wash the roof with an automotive wax and tar/grease cleaning solvent available at Walmart, Home Depot, etc. Use plenty of rags. Keep exchanging for a new cloth surface as you wipe areas of the roof down. The intent is to remove surface waxes or oils so the paint will have adequate adhesion. Once the roof is dry, tape the edges where the roof joins the painted areas. Apply the masking tape (2” recommended) so a slight amount of the painted surface is visible. This will enable the roof paint to “seal” the edge of the RV paint’s clear coat and help prevent it from peeling. Also consider taping off roof items like the ACs to protect them from possible over-paint.
The complete prep takes 3-4 hours.
Application:
Apply the paint using 6” rollers available from any paint/home improvement store. Smaller diameter rollers work better around the air conditioner edges and other obstacles. Painting the Dicor sealant around the various roof structures will protect it from UV effects. Use a brush when necessary to cover the Dicor and to get under the edges of structures like ACs and solar panels. The paint is oil based so allow it to dry overnight before applying a second coat. The first coat will appear somewhat rough but the second coat will dry smooth. For added protection you may apply a 3rd coat but 2 coats will normally provide the needed protection and durability.




Rust-Oleum 206999 Marine Topside Paint, Gloss White, 1-QuartRust-Oleum 206999 Marine Topside Paint, Gloss White, 1-Quart
Kleanstrip Prep-All Wax & Grease Remover, Gallon (KLE-GSW362)



Lot of 5 Red 3M Scuff Pads Scotch Brite 3M Brand


https://www.amazon.com/ScotchBlue-Pa...%2C262&sr=8-45

Tape around the bottom of AC to keep from getting it on them from the roller.










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Old 12-08-2021, 03:37 PM   #4
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I scrubbed mine down and then cleansed further with liquid sandpaper, which easily removed the oxidation. Then I painted with Dicor's Fiberglass RV Roof Coat. The entire job, including making around the roof edge and applying two coats of paint, took about 5 hours.
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Old 12-08-2021, 03:42 PM   #5
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Had the same issue pretty bad

Ended up washing real well then used thetford fiberglass oxidation removal

https://www.campingworld.com/protect...B&gclsrc=aw.ds

Then applied 303 aerospace on it afterwards

Have repeated.the process

But as others have done plan on painting most likely with Dicor roof paint
After other projects

Greg
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Old 12-08-2021, 06:54 PM   #6
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I second the Rustoleum Fiberglass Paint.
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Old 12-08-2021, 07:33 PM   #7
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After washing all I have every used was Meguiar's cleaner polish and I do not have white streaks. I have the same fiberglass as you have. I wax the roof 1 to 2 times a year.
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Old 12-08-2021, 07:51 PM   #8
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Quote:
Originally Posted by barmcd View Post
I second the Rustoleum Fiberglass Paint.

How many quarts for a 40' coach?
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Old 12-08-2021, 09:48 PM   #9
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Quote:
Originally Posted by okcnewbie View Post
How many quarts for a 40' coach?
I ordered 4 qts and used a little over 3.5qts and mine is a 40ft.
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Old 12-09-2021, 04:14 PM   #10
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Another Rustoleum Topside paint fan! My 37 footer only took less than 3 quarts to do two coats. Great stuff!

Remember, 80% of a paint job's success, is in the prep.
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Old 12-10-2021, 08:18 AM   #11
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Dicor's Fiberglass RV Roof Coat - One of the best upgrades I've done (Video)

Quote:
Originally Posted by Gary RVRoamer View Post
I scrubbed mine down and then cleansed further with liquid sandpaper, which easily removed the oxidation. Then I painted with Dicor's Fiberglass RV Roof Coat. The entire job, including making around the roof edge and applying two coats of paint, took about 5 hours.
Yep I did the same thing. I followed an excellent YT video that I found that explains the process. Now I just wash it usually twice a year when I wash the coach, it reflects a lot of heat from the sun, it's not slippery to walk on and no more maintenance. One of the best upgrades I've done
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Old 12-15-2021, 07:04 PM   #12
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Going with the rust oleum.
This is what it looks like after prep.
I set sanded with 50/50 bleach water mixture.
Wanted to paint today but too windy.
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Old 12-15-2021, 07:25 PM   #13
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Good choice! You won’t regret it
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Old 12-16-2021, 02:10 PM   #14
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Fiberglass roof oxidation

Thanks for the input. Going to go with the Rustoleum product.
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