Removing RTV silicone from bright metal trim

plumbing bathroom place should have silicone sealer removal stuff

normally you paint it on, around your bath or shower. and then strip out the now softened sealer re apply and then scrape until none is left

if it works there i'd suggest it probably works elsewhere
softens the silicone

Google Search

if the hardware shops in the UK are full of it i'd guess your local places will have something similar