Cleaning a fibreglass roof

I’ve used Cif (formally known as Jiff) with a sponge scourer with good effect. Smells nice too!

Cheapo own brand supermarket stuff just as effective.

 

On and off within a couple of minutes or it'll leave a nasty stain ...

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I've always been told to avoid T-cut on fiberglass as it contains ammonia and can cause yellowing?
Farecla is good though (as long as you aren't down to the fibers). G3 then G10 if it's bad, or straight to the G10 if it's not so bad. then a good waxing! That's what they do with motorhome panels.

 

For a spit second I thought you said it was formally known as jizz

 

I was waiting for that...

 

G3’s the stuff I use.

 

Looks like a huge amount of elbow grease would be needed as well!

Great job, well done!

 

Was a long time ago. I've never let it get that bad again. Odd how algae love fibreglass.