Hey guys - the irony here is that the panel beater is asking for some restoration help!

I'm having a really hard time getting the paint/what is almost a rubberised coating off the window and door mouldings and trims. Want to get them back to metal to then repaint as the coating is all cracked.

I've tried soaking in thinners/prepsol for ages, sanding it off, scraping/cutting it off and all the conventional techniques but they're ultra laborious.

Has anyone done it before and have any special tips for it that might speed up the process?

Thanks!