You could try sulphuric acid. That bumps anything off!
But, you wouldn't do your leather any good.
Joke aside, I hope you find what you need, maybe a dab of petrol may help??
Good luck.

E30 M3 Unichip Alpha N style conversions, this is the ultimate for extracting the best out of your S14 M power car.
Also, Live mapping of your Standard Motronic ECU for optimising all your modifications.
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