Black Oak

How can I strip the hundreds of years of black paint from the oak beams in my 17th century cottage?
Nature Protecta “GL Liquid Strip-It” paint Stripper is a professional strength uniquely, environmentally compatable Paint & Varnish Stripper capable of removing up to ten paint layers in one application. “GL Liquid Strip-It is biodegradable, Non-flammable, virtually odourless and can be cleaned up with water. It contains no methylene chloride, caustic, harsh chemicals or harmful vapours like many conventional removers. “GL Liquid Strip-It” avoids the uncertainty associated with other removers that are ineffective if removed too soon, or dry out and not work if left on too long. “GL Liquid Strip-It” not only eliminates the guesswork and is safer to use, but will strip 5-10 times more paint than conventional liquid paint removers.
Black Oak Arkansas hey ya’ll