Hi, I run own bath resurfacing company. You can check the website for the idea of how it's done on-site. It's a one day process that I well documented in a gallery, described on several pages there and even run a blog so I strongly encourage you to visit and see by yourself. If you'd like to speak with any of my customer to ask about the durability during the years, I can arrange it if you send me an email. I also have a current UK price guide so, that shall answer most of your questions here: www.eagerbeaver.org.uk