Are these stains recent or have they been there a long long time?
If they’re relatively fresh I use Totally Awesome cleaner properly diluted for whatever kind of roof material you might have....TPO, Rubber, Fibreglass. Make sure you really rinse well with lots of water.
If they’re years old.....you might never get it clean.
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Ken and Terry
2018 Sunseeker 2430S-CD, nicely modified and carried by a 2017 Ford E450 Sport
Former Georgetown 330TS owner for 10 years with more mods than I can count, pushed by our 2017 GMC Terrain
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