fellow mud member painting a shop railing in his greenhouse, outdoor temp 44* and cranked the greenhouse heat to 65* live in Oregon so it's pretty wet, after a coat of Rustoleum self etch and a coat of their 2X hammered finish he says he can scrape the paint off with his fingernail. not tacky though. I'm thinking by raising the temp in the greenhouse he took the humidity outside of desirable levels. is he better off applying another coat in the greenhouse at the same temp? turning off the heat and opening the doors and applying another coat at 44*? should the paint set up better over time once it has the ability to cure?