Use regular aircraft-type gel paint stripper, and blast the softened paint off with a pressure washer or the wand from a coin car wash once the paint is loosened. Be sure and wear rubber gloves, and safety glasses. That stripper is rough on skin and eyes!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!