Hi all. I have a plastic SWF screen washer bottle that has yellowed with age. Does anyone have a tried and tested method of getting it looking a bit nicer/newer, or has it had it?

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velvet green
A friend of mine used to lightly wet and dry, and bleach slightly the outer surface. He then would clear fiberglass resin the outside of the bottle. It would look great, be hard and not leak.
I've used a DIY mixture (hydrogen peroxide, xanthan gum, glycerine and 'oxygen action' type clothes washing additive stuff) on some yellowed ABS computer cases with good results. I don't know if the bottle is made of a similar plastic which might react in the same way, but it might be worth a go. 
You can call me Al.
Thanks for the replies, I'll give the bleach a try on the base and see if that improves it.
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