Making up a cleaning kit

[Gnasher]

Gnasher you foccing legend!! ??

It's not quite as clean as it was before the incident but it's definitely 100x better. Once I've given it all another proper wash then I reckon the issue will be resolved.
Thanks again ??

You're welcome bud.

The rubber hardness/composition has a big impact on the results it's a bit pot luck until you find what rubber works best, with whatever you've put on the trim surface.  The fact you've used other products especially alcohol it will have set the stuff and attacked the ABS plastic surface, hence the lighter surface were you've treated it.  Try Autoglym bumper gel, Armour All or back to black stuff and it will come back as good as new.  Again you get different results, it's a matter of finding out what works best with your trim.