I am planning on stripping woodwork that has been painted several times over by previous owner. I am sure there must be some lead paint there too. I don't know whether to use an infrared heating instrument I have seen in my google searches or a stripper such as a soy based stripper or Peel Away 7. I want to get it down to the natural wood and put a coat of varnish or stain/polyurethane it. I have used Peel Away 7 in the past to remove several coats of paint on a door frame but it left somewhat of a white wash residue on the wood. Is Peel Away 1 better to use? What is the most effective/efficient way of removing it and what other steps should I do before staining/poly?