Took the cover off my boat to get it ready and i have these random brown spots. They look like rust stains but darker, only no metal came into contact. I tried softscrub soap and water and armor all but they will not come out, any help?
They are likely Mold stains.
If they occur on some panels but not adjacent ones then it's very possible coming from the foam backing under the vinyls surface.
Staining issues sometimes lie within the vinyl characteristics.
Glues and foam backings cross contaminate the vinyl surface setting the conditions for staining to occur.
Additionally the staining can also be mold growth in the foam section that bleeds to the vinyl surface from the backside
Due to the expense many times the foam backing is not treated with antimicrobials.
Lack of a high quality top coat adds to the poor resistance of vinyl reacting to organic compounds that come in contact with it.
If it goes away when exposed to sunlight the condition is Dehydrochlorination.
Certain boat brands exhibit this staining problem while many others do not.
Higher quality vinyl’s resist any staining or discoloration.
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