I partially agree with Gene T -- why remove the two coats of Trinidad assuming it is in sound shape? I'd repaint, but using an ablative so that you won't get a build up of layers of paint
in the future.
But to answer your question if you really, really want to remove that paint
: yes, I have used chemicals twice and they work very well. Depending on the brand you use, apply it, wait the stated time for it to work, test a patch to see if it comes off easily, if not wait a bit longer. I use plastic scrapers from Home Despot.