I have read so many conflicting/different opinions on hardener, and brands to use and not use with JD classic paint that it has me completely confused. I have used Sherwin Williams paints and had not problems, but was advised to use strictly JD paint for what I am doing (4230). My question is can you use AIC (sherwin) AIH50 hardener (acrylic enamel) with JD classic paint? Some say yes some say no, some say use only JD hardener, some say don't use hardener at all, some say NAPA works fine. It sounds like whatever works works. But doing this once is enough. Just painting small things and have SW hardener. JD REN3001 is not readily available and very expensive. Experience would be appreciated.