I've used "Ronseal 10 Year Weatherproof Wood Paint - Gloss" a year back on my front door and so far so good, I've seen a few similar products like Zinsser AllCoat Exterior. They make bold claims "paint on anything" and generally I see positive reviews but people aren't generally going to be reviewing 3 years after painting.
Do they actually do anything special/different to regular paint?
Do they actually do anything special/different to regular paint?