Cleaning white plastic, bird poo?

[Major Fallout]

I have a white plastic roof in NHS beige, but it was brilliant white.

Now I have just cleaned off some bird poop and its bleached it back to white, how can I repeat this without covering it in bird seed or spending the rest of days t-cutting it?

I'm thinking its the acid in the poop? So would vinegar do the job or a strong alkaline like bleach work?

[Major Fallout]

Nothing :-(

Anyone have on ostrich I can borrow?

[Dr Interceptor]

What type of plastic and finish is it? Glossy/Matt? ABS Plastic?

Something like a boat restorer product might help restore it, and protect it going forward also? http://www.3mdirect.co.uk/p-2568-boat-wax-3m-marin...

[Pothole]

Garden furniture cleaner?

[Major Fallout]

Update!

Bleach did the trick, it's don't a fantastic job and no elbow work :-)