PA as you can see, many different techniques. I have had three boats now and, for me, simple is better. I have removed the teak, my first boat, and did not find it was worth the effort. lots of Work for no gain, plus you make leaks, unless you already have leaks, the maybe it needs removal for that purpose. I like simply removing the old finish with a good paste. Wipe the paste off the Gell Coat as you go along and it will not (hardly) do any damage. Pick small areas you can do in stages. Remove the softened finish with a scraper and then again apply more paste and remove it with some heavy duty thick green 3m pads. You can clean those pads after they dry out and use them again. Lots of pads and lots of rags. I actually use either paste and/or heat gun, depending on my mood and the area. Then clean with your choice, sand smooth to about 220 grit, then prep surface for cetol. Cetol is not as pretty but the fastest and most forgiving. four coats. You will develope your own technique around the third season.