My first impulse is to say 'Herculiner', mainly because that's the one I'm most familiar with from advertising. And it has been around about the longest and it's available as a spray can. Another possibility is Rustoleum brand, again because of brand recognition. Also available as a rattle can. There are others, but I believe those two would be my picks- realizing I don't have any first hand w/any of them. All that said, I don't know how much my theory of brand recognition will hold up, seeing as how Dupli-Color is a well known brand as well! I suppose in the end you pays your money and takes your chances.