Cleaning black plastic trim

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   I have been looking for a good reliable way to remove dried on wax from black plastic trim for years and have tried all manner of cleaners and treatments but most only work well on already clean plastics or else they simply mask the engrained wax.
There is talk all over various forums about the use of peanut butter in the cleaning of black plastic trim and so far I have resisted since I was doubtful....but recently I spotted a thread that pointed out the fact that it's not that it's peanut butter but that it contains peanut oil and that dissolves the wax.....

So that got me thinking, and rummaging through the kitchen cupboards for oil.....I didn't find any peanut oil but I did find walnut oil, close enough for a try I thought. 

My sons Clio has lots of black plastic and he wasn't that careful when we waxed it so I had a good guinea pig to try it out on, well, I couldn't believe it, I just put a drop on an old toothbrush and gently worked it in, you could actually see the oil turning slightly milky as the wax dissolved.

When finished I simply buffed with a cloth, now it's only been a few hours since I did it but I have so say I am very impressed and there's no residue left behind, the plastic looks like new!

I'll put some protector on it tomorrow and see how it lasts but it's a very cheap way to restore black plastic trim.

Cheers,
Darren.