I've tried Ready Strip
I've used one of the Pratical Sailor test chemicals, Ready Strip. It did OK on the ablative topcoat, but was not near so effective on the underlying hard paint. Ready Strip softens the gellcoat a bit, so you need to let the surface dry out for a day or two after stripping and washing. Still had a lot of sanding to get it the rest off. I found this stuff at the local lumber yard for $28/gallon.
I agree with previous posts: unless you really need to get it all off, I'd sand the Trinidad and apply two coats of a good ablative.