The strippers work pretty well. I just took 20 years worth off a 30 footer that I purchased less than a year ago. That much is very nasty. If you just have 2-3 coats the marine strippers will work well. You need rubber gloves and a cheap rain coat. A full mask is a good idea or use monogogles and be careful.
A wide stripper scrapper works well and also a pull scraper adds variety. I used an old large coffee can and after each scrape put it directly into the can. You will likely have to put a plastic sheet down to catch some of it.